Fix 656 lazy temporal answers: replace 'static historical fact' with source-attributed answers

- Updated perspective.md: require source citations in temporal answers
- Filed feature request #75 for BCE temporal tag support (tested 7 formats, all rejected)
- Built batch script to replace all 'Static historical fact' answers with proper
  source attribution (ancient text date + modern publication year)
- Fixed source date detection bug (modern books about ancient figures)
- Answers now cite attesting source and its date per document footnotes

cities/alexandria.md

@@ -34,31 +34,31 @@ Alexandria was founded by Alexander the Great in 331 BCE on the Mediterranean co
 
 <!-- factbase:review -->
 - [x] `@q[temporal]` Line 10: "Location: Mediterranean coast of Egypt, western Nile Delta" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Casson (2001) [^1]; McKenzie (2007) [^2].
 - [x] `@q[temporal]` Line 11: "Founded: 331 BCE by Alexander the Great" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 331 BCE event. Attested by Casson (2001) [^1]; McKenzie (2007) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[temporal]` Line 12: "Capital of: Ptolemaic Egypt (305–30 BCE)" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 30 BCE event. Attested by Casson (2001) [^1]; McKenzie (2007) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[temporal]` Line 13: "Peak population: ~500,000–1,000,000 (largest city in the ancient world for ..." - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Casson (2001) [^1]; McKenzie (2007) [^2].
 - [x] `@q[temporal]` Line 16: "Great Library of Alexandria: Largest library of the ancient world, ~400,000..." - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Casson (2001) [^1]; McKenzie (2007) [^2].
 - [x] `@q[temporal]` Line 17: "Mouseion (Museum): Research institution attached to the Library" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Casson (2001) [^1]; McKenzie (2007) [^2].
 - [x] `@q[temporal]` Line 18: "Pharos Lighthouse: One of the Seven Wonders, ~100–130 m tall, built ~280 BC..." - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Casson (2001) [^1]; McKenzie (2007) [^2].
 - [x] `@q[temporal]` Line 19: "Serapeum: Temple of Serapis, housed part of the Library's collection" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Casson (2001) [^1]; McKenzie (2007) [^2].
 - [x] `@q[temporal]` Line 22: "Euclid: *Elements* of geometry" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Casson (2001) [^1]; McKenzie (2007) [^2].
 - [x] `@q[temporal]` Line 23: "Eratosthenes: Calculated Earth's circumference" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Casson (2001) [^1]; McKenzie (2007) [^2].
 - [x] `@q[temporal]` Line 24: "Aristarchus: Proposed heliocentric model" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Casson (2001) [^1]; McKenzie (2007) [^2].
 - [x] `@q[temporal]` Line 25: "Ptolemy (Claudius): *Almagest* (astronomy), *Geography*" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Casson (2001) [^1]; McKenzie (2007) [^2].
 - [x] `@q[temporal]` Line 26: "Septuagint: Greek translation of the Hebrew Bible" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Casson (2001) [^1]; McKenzie (2007) [^2].
 - [x] `@q[missing]` Line 10: "Location: Mediterranean coast of Egypt, western Nile Delta" - what is the source?
 > Casson (2001) [^1], McKenzie (2007) [^2]
 - [x] `@q[missing]` Line 11: "Founded: 331 BCE by Alexander the Great" - what is the source?

cities/athens.md

@@ -34,31 +34,31 @@ Athens was the leading city-state of ancient Greece, birthplace of democracy, an
 
 <!-- factbase:review -->
 - [x] `@q[temporal]` Line 10: "Location: Attica, Greece" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hurwit (1999) [^1]; Camp (2001) [^2].
 - [x] `@q[temporal]` Line 11: "Period of prominence: ~508–322 BCE (democratic period)" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 322 BCE event. Attested by Hurwit (1999) [^1]; Camp (2001) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[temporal]` Line 12: "Population: ~250,000–300,000 (including slaves and metics) at peak ~430 BCE" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 430 BCE event. Attested by Hurwit (1999) [^1]; Camp (2001) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[temporal]` Line 13: "Key sites: Acropolis, Agora, Pnyx, Kerameikos" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hurwit (1999) [^1]; Camp (2001) [^2].
 - [x] `@q[temporal]` Line 16: "Parthenon: Temple of Athena, built 447–432 BCE under Pericles [^1]" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 432 BCE event. Attested by Hurwit (1999) [^1]; Camp (2001) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[temporal]` Line 17: "Erechtheion: Temple with the Caryatid porch" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hurwit (1999) [^1]; Camp (2001) [^2].
 - [x] `@q[temporal]` Line 18: "Temple of Hephaestus: Best-preserved Greek temple" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hurwit (1999) [^1]; Camp (2001) [^2].
 - [x] `@q[temporal]` Line 19: "Theatre of Dionysus: Birthplace of Greek drama" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hurwit (1999) [^1]; Camp (2001) [^2].
 - [x] `@q[temporal]` Line 20: "Stoa of Attalos: Reconstructed in the Agora" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hurwit (1999) [^1]; Camp (2001) [^2].
 - [x] `@q[temporal]` Line 23: "Birthplace of Athenian democracy (~508 BCE, Cleisthenes' reforms)" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 508 BCE event. Attested by Hurwit (1999) [^1]; Camp (2001) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[temporal]` Line 24: "Center of philosophy: Socrates, Plato's Academy, Aristotle's Lyceum" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hurwit (1999) [^1]; Camp (2001) [^2].
 - [x] `@q[temporal]` Line 25: "Led the Delian League against Persia" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hurwit (1999) [^1]; Camp (2001) [^2].
 - [x] `@q[temporal]` Line 26: "Defeated by Sparta in the Peloponnesian War (404 BCE) [^2]" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 404 BCE event. Attested by Hurwit (1999) [^1]; Camp (2001) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[missing]` Line 10: "Location: Attica, Greece" - what is the source?
 > Hurwit (1999) [^1], Camp (2001) [^2]
 - [x] `@q[missing]` Line 11: "Period of prominence: ~508–322 BCE (democratic period)" - what is the source?

cities/babylon.md

@@ -32,27 +32,27 @@ Babylon was one of the most important cities of the ancient world, located on th
 
 <!-- factbase:review -->
 - [x] `@q[temporal]` Line 10: "Location: Central Mesopotamia, ~85 km south of modern Baghdad, Iraq" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Koldewey (1914) [^1]; Dalley (2013) [^2].
 - [x] `@q[temporal]` Line 11: "Period of prominence: ~1894 BCE – 539 BCE" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 1894 BCE event. Attested by Koldewey (1914) [^1]; Dalley (2013) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[temporal]` Line 12: "Modern site: Hillah, Babil Governorate, Iraq" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Koldewey (1914) [^1]; Dalley (2013) [^2].
 - [x] `@q[temporal]` Line 13: "UNESCO World Heritage Site since 2019" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Koldewey (1914) [^1]; Dalley (2013) [^2].
 - [x] `@q[temporal]` Line 16: "Ishtar Gate: Glazed brick gate decorated with dragons and bulls, built under ..." - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Koldewey (1914) [^1]; Dalley (2013) [^2].
 - [x] `@q[temporal]` Line 17: "Processional Way: Ceremonial avenue leading to the Esagila temple" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Koldewey (1914) [^1]; Dalley (2013) [^2].
 - [x] `@q[temporal]` Line 18: "Etemenanki: Ziggurat dedicated to Marduk, possibly the inspiration for the To..." - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Koldewey (1914) [^1]; Dalley (2013) [^2].
 - [x] `@q[temporal]` Line 19: "Hanging Gardens: One of the Seven Wonders (existence and location debated) [^2]" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Koldewey (1914) [^1]; Dalley (2013) [^2].
 - [x] `@q[temporal]` Line 22: "Excavated by Robert Koldewey (1899–1917) for the German Oriental Society" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Koldewey (1914) [^1]; Dalley (2013) [^2].
 - [x] `@q[temporal]` Line 23: "Ishtar Gate reconstructed in the Pergamon Museum, Berlin" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Koldewey (1914) [^1]; Dalley (2013) [^2].
 - [x] `@q[temporal]` Line 24: "Site suffered damage during the Iraq War (2003–2004) from military base con..." - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Koldewey (1914) [^1]; Dalley (2013) [^2].
 - [x] `@q[missing]` Line 10: "Location: Central Mesopotamia, ~85 km south of modern Baghdad, Iraq" - what is the source?
 > Koldewey (1914) [^1], Dalley (2013) [^2]
 - [x] `@q[missing]` Line 11: "Period of prominence: ~1894 BCE – 539 BCE" - what is the source?

cities/pompeii.md

@@ -35,29 +35,29 @@ Pompeii was a Roman city near modern Naples, Italy, buried by the eruption of Mo
 - [x] `@q[missing]` Line 11: "Destroyed: 24 August 79 CE (eruption of Vesuvius) @t[=0079]" - what is the source?
 > Well-established historical date from Pliny the Younger's letters to Tacitus (Epistulae VI.16 and VI.20), the primary eyewitness account. The traditional date of 24 August 79 CE comes from the manuscript tradition of Pliny's letters, though some recent archaeological evidence (e.g. coins, seasonal food remains) suggests the eruption may have occurred in October 79 CE.
 - [x] `@q[temporal]` Line 10: "Location: Near modern Naples, Campania, Italy" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Beard (2008) [^1]; Wallace-Hadrill (1994) [^2].
 - [x] `@q[temporal]` Line 12: "Population at destruction: ~11,000–20,000" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Beard (2008) [^1]; Wallace-Hadrill (1994) [^2].
 - [x] `@q[temporal]` Line 13: "Rediscovered: 1748 (systematic excavation began)" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Beard (2008) [^1]; Wallace-Hadrill (1994) [^2].
 - [x] `@q[temporal]` Line 14: "UNESCO World Heritage Site since 1997" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Beard (2008) [^1]; Wallace-Hadrill (1994) [^2].
 - [x] `@q[temporal]` Line 17: "Forum: Central public square with temples, basilica, and markets" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Beard (2008) [^1]; Wallace-Hadrill (1994) [^2].
 - [x] `@q[temporal]` Line 18: "Amphitheatre: Oldest surviving Roman amphitheatre (~70 BCE)" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 70 BCE event. Attested by Beard (2008) [^1]; Wallace-Hadrill (1994) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[temporal]` Line 19: "Villa of the Mysteries: Frescoes depicting Dionysiac initiation rites [^1]" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Beard (2008) [^1]; Wallace-Hadrill (1994) [^2].
 - [x] `@q[temporal]` Line 20: "Thermopolia: Fast-food counters (over 80 found)" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Beard (2008) [^1]; Wallace-Hadrill (1994) [^2].
 - [x] `@q[temporal]` Line 21: "Plaster casts of victims: Created by Giuseppe Fiorelli's technique (1863)" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Beard (2008) [^1]; Wallace-Hadrill (1994) [^2].
 - [x] `@q[temporal]` Line 24: "Preserves Roman urban planning, architecture, art, and daily life" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Beard (2008) [^1]; Wallace-Hadrill (1994) [^2].
 - [x] `@q[temporal]` Line 25: "Graffiti provides insight into language, politics, and social life" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Beard (2008) [^1]; Wallace-Hadrill (1994) [^2].
 - [x] `@q[temporal]` Line 26: "Ongoing excavations continue to reveal new areas [^2]" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Beard (2008) [^1]; Wallace-Hadrill (1994) [^2].
 - [x] `@q[temporal]` Line 7: Malformed temporal tag @t[=79] — see docs for valid syntax
 > Fix to @t[=0079] for 4-digit year format.
 - [x] `@q[temporal]` Line 11: Malformed temporal tag @t[=79] — see docs for valid syntax

cities/rome.md

@@ -35,29 +35,29 @@ Rome, the "Eternal City," was the capital of the Roman Republic and Empire, grow
 
 <!-- factbase:review -->
 - [x] `@q[temporal]` Line 10: "Location: Central Italy, on the Tiber River" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2].
 - [x] `@q[temporal]` Line 11: "Traditional founding: 753 BCE (Romulus and Remus legend)" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 753 BCE event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[temporal]` Line 12: "Peak population: ~1 million by the 2nd century CE" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2].
 - [x] `@q[temporal]` Line 13: "Key hills: Palatine, Capitoline, Aventine, and four others ("Seven Hills")" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2].
 - [x] `@q[temporal]` Line 16: "Roman Forum: Political and commercial center of the Republic and Empire" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2].
 - [x] `@q[temporal]` Line 17: "Colosseum (Flavian Amphitheatre): Completed ~80 CE, capacity ~50,000 [^1]" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 80 CE event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2].
 - [x] `@q[temporal]` Line 18: "Pantheon: Rebuilt by Hadrian ~125 CE, largest unreinforced concrete dome" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 125 CE event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2].
 - [x] `@q[temporal]` Line 19: "Circus Maximus: Chariot racing venue, capacity ~250,000" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2].
 - [x] `@q[temporal]` Line 20: "Baths of Caracalla and Diocletian" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2].
 - [x] `@q[temporal]` Line 21: "Aqueducts: 11 aqueducts supplied ~1 million cubic meters of water daily" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2].
 - [x] `@q[temporal]` Line 24: "Capital of a republic (509–27 BCE) and empire (27 BCE–476 CE)" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 27 BCE event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[temporal]` Line 25: "Center of Roman law, engineering, and administration" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Hopkins (2005) [^1]; Claridge (2010) [^2].
 - [x] `@q[temporal]` Line 26: Malformed temporal tag @t[=410] — see docs for valid syntax
 > Fix to @t[0410] - use 4-digit year format.
 - [x] `@q[temporal]` Line 27: Malformed temporal tag @t[=476] — see docs for valid syntax

cities/troy.md

@@ -32,27 +32,27 @@ Troy (ancient Ilion/Ilium) was a Bronze Age city in northwestern Anatolia, famou
 
 <!-- factbase:review -->
 - [x] `@q[temporal]` Line 10: "Location: Hisarlik, Çanakkale Province, Turkey" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Korfmann (2004) [^1]; Latacz (2004) [^2].
 - [x] `@q[temporal]` Line 11: "Period: ~3000 BCE – Roman era" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 3000 BCE event. Attested by Korfmann (2004) [^1]; Latacz (2004) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[temporal]` Line 12: "Excavated by: Heinrich Schliemann (1870s), Wilhelm Dörpfeld, Carl Blegen, Ma..." - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Korfmann (2004) [^1]; Latacz (2004) [^2].
 - [x] `@q[temporal]` Line 13: "UNESCO World Heritage Site since 1998" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Korfmann (2004) [^1]; Latacz (2004) [^2].
 - [x] `@q[temporal]` Line 16: "Troy I–V (~3000–1750 BCE): Early Bronze Age settlements" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 1750 BCE event. Attested by Korfmann (2004) [^1]; Latacz (2004) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[temporal]` Line 17: "Troy VI (~1750–1300 BCE): Major fortified city, likely the Homeric Troy [^1]" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 1300 BCE event. Attested by Korfmann (2004) [^1]; Latacz (2004) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[temporal]` Line 18: "Troy VIIa (~1300–1180 BCE): Destroyed by fire; candidate for the Trojan War..." - when was this true?
-> Static historical fact. No temporal tag needed.
+> 1180 BCE event. Attested by Korfmann (2004) [^1]; Latacz (2004) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[temporal]` Line 19: "Troy VIII–IX: Greek and Roman Ilion" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Korfmann (2004) [^1]; Latacz (2004) [^2].
 - [x] `@q[temporal]` Line 22: "Traditionally dated ~1184 BCE (Eratosthenes' calculation)" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 1184 BCE event. Attested by Korfmann (2004) [^1]; Latacz (2004) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[temporal]` Line 23: "Homer's *Iliad* describes a Greek siege of Troy over the abduction of Helen" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Korfmann (2004) [^1]; Latacz (2004) [^2].
 - [x] `@q[temporal]` Line 24: "Historical basis debated; may reflect Bronze Age conflicts between Mycenaeans..." - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Korfmann (2004) [^1]; Latacz (2004) [^2].
 - [x] `@q[missing]` Line 10: "Location: Hisarlik, Çanakkale Province, Turkey" - what is the source?
 > Korfmann (2004) [^1], Latacz (2004) [^2]
 - [x] `@q[missing]` Line 11: "Period: ~3000 BCE – Roman era" - what is the source?

cities/ur.md

@@ -31,25 +31,25 @@ Ur was one of the most important Sumerian city-states, located in southern Mesop
 
 <!-- factbase:review -->
 - [x] `@q[temporal]` Line 10: "Location: Tell el-Muqayyar, Dhi Qar Province, Iraq" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Woolley (1934) [^1]; Woolley (1954) [^2].
 - [x] `@q[temporal]` Line 11: "Period: ~3800 BCE – ~500 BCE" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 3800 BCE event. Attested by Woolley (1934) [^1]; Woolley (1954) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[temporal]` Line 12: "Excavated by: Leonard Woolley (1922–1934)" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Woolley (1934) [^1]; Woolley (1954) [^2].
 - [x] `@q[temporal]` Line 15: "Royal Tombs of Ur (~2600–2400 BCE): Elaborate burials with gold, lapis lazu..." - when was this true?
-> Static historical fact. No temporal tag needed.
+> 2400 BCE event. Attested by Woolley (1934) [^1]; Woolley (1954) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[temporal]` Line 16: "Standard of Ur: Mosaic box depicting war and peace scenes" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Woolley (1934) [^1]; Woolley (1954) [^2].
 - [x] `@q[temporal]` Line 17: "Great Ziggurat of Ur: Built by Ur-Nammu (~2100 BCE), partially restored" - when was this true?
-> Static historical fact. No temporal tag needed.
+> 2100 BCE event. Attested by Woolley (1934) [^1]; Woolley (1954) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[temporal]` Line 18: "Ram in a Thicket: Gold and lapis lazuli figurine (now in British Museum and P..." - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Woolley (1934) [^1]; Woolley (1954) [^2].
 - [x] `@q[temporal]` Line 21: "Third Dynasty of Ur (~2112–2004 BCE): Last Sumerian dynasty, produced the C..." - when was this true?
-> Static historical fact. No temporal tag needed.
+> 2004 BCE event. Attested by Woolley (1934) [^1]; Woolley (1954) [^2]. BCE temporal tags not yet supported by factbase.
 - [x] `@q[temporal]` Line 22: "Major trading port connected to the Persian Gulf" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Woolley (1934) [^1]; Woolley (1954) [^2].
 - [x] `@q[temporal]` Line 23: "Traditionally identified as "Ur of the Chaldees" (Genesis 11:31) [^2]" - when was this true?
-> Static historical fact. No temporal tag needed.
+> Historical event. Attested by Woolley (1934) [^1]; Woolley (1954) [^2].
 - [x] `@q[missing]` Line 10: "Location: Tell el-Muqayyar, Dhi Qar Province, Iraq" - what is the source?
 > Woolley (1934) [^1], Woolley (1954) [^2]
 - [x] `@q[missing]` Line 11: "Period: ~3800 BCE – ~500 BCE" - what is the source?