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Geographic Facts Verification

4 real rows pulled directly from the full dataset, unedited — the actual field structure and content a buyer receives. The full purchase includes all 40 rows.

Row 1 of 40
row_id
GF01
claim
Paris is the capital of France.
claim_source_url
https://en.wikipedia.org/wiki/Paris
verification_method
factbook+wikidata
verified_value
Capital: Paris (CIA World Factbook, last public snapshot); Wikidata Q142 (France) P36 'capital' = Q90 (Paris), rank 'preferred'
verification_source_url
https://raw.githubusercontent.com/factbook/factbook.json/master/europe/fr.json ; https://www.wikidata.org/wiki/Q142#P36
agreement
match
explanation
Fetched France's Factbook record live (europe/fr.json, 200 OK): Government.Capital.name = 'Paris'. Independently queried live Wikidata for entity Q142 (France), property P36 (capital): the sole 'preferred'-rank statement resolves to Q90, whose English label is 'Paris'. Both sources, maintained independently, agree exactly.
grading_mode
exact
difficulty
easy
tags
[
  "capitals",
  "france",
  "europe"
]
model_tested
claude-sonnet-5
model_question
What is the capital city of France?
model_response
Paris is the capital city of France.
model_verdict
correct
model_grading_note
Matches verified capital Paris.
Row 2 of 40
row_id
GF02
claim
Istanbul is the capital of Turkey.
claim_source_url
https://en.wikipedia.org/wiki/Istanbul
verification_method
factbook+wikidata
verified_value
Capital: Ankara, not Istanbul (Factbook); Wikidata Q43 (Turkey) P36 = Q3640 (Ankara)
verification_source_url
https://raw.githubusercontent.com/factbook/factbook.json/master/middle-east/tu.json ; https://www.wikidata.org/wiki/Q43#P36
agreement
diverges
explanation
Turkey's live Factbook record (middle-east/tu.json) gives Government.Capital.name = 'Ankara'. Live Wikidata Q43 P36 also resolves to Q3640, labeled 'Ankara'. Both independent sources agree the capital is Ankara, not Istanbul. Istanbul's own Wikipedia article states this explicitly ('Although the Republic of Turkey established its capital in Ankara...') — this is one of the most common real-world capital-city mix-ups, since Istanbul is Turkey's largest city, former imperial capital, and the one most people picture; Ankara has been the capital only since 1923.
grading_mode
exact
difficulty
easy
tags
[
  "capitals",
  "turkey",
  "common-misconception"
]
model_tested
claude-sonnet-5
model_question
What is the capital city of Turkey?
model_response
The capital of Turkey is Ankara.
model_verdict
correct
model_grading_note
Ground truth diverges from claim and confirms Ankara as actual capital, matching model's answer.
Row 3 of 40
row_id
GF03
claim
Sydney is the capital of Australia.
claim_source_url
https://en.wikipedia.org/wiki/Sydney
verification_method
factbook+wikidata
verified_value
Capital: Canberra, not Sydney (Factbook); Wikidata Q408 (Australia) P36 = Q3114 (Canberra)
verification_source_url
https://raw.githubusercontent.com/factbook/factbook.json/master/australia-oceania/as.json ; https://www.wikidata.org/wiki/Q408#P36
agreement
diverges
explanation
Australia's live Factbook record (australia-oceania/as.json) gives Government.Capital.name = 'Canberra'. Live Wikidata Q408 P36 resolves to Q3114, labeled 'Canberra', with a real external reference URL attached to the statement (australia.gov.au's own 'capital cities' page). Both sources agree: Canberra was purpose-built as a compromise capital in 1908 specifically because Sydney and Melbourne could not agree which of them should hold the title — Sydney, despite being the largest and most internationally recognizable Australian city, has never been the capital.
grading_mode
exact
difficulty
easy
tags
[
  "capitals",
  "australia",
  "common-misconception"
]
model_tested
claude-sonnet-5
model_question
What is the capital city of Australia?
model_response
Canberra.
model_verdict
correct
model_grading_note
Ground truth diverges from claim and confirms Canberra as actual capital, matching model's answer.
Row 4 of 40
row_id
GF04
claim
Rio de Janeiro is the capital of Brazil.
claim_source_url
https://en.wikipedia.org/wiki/Rio_de_Janeiro
verification_method
factbook+wikidata
verified_value
Capital: Brasília, not Rio de Janeiro (Factbook, since 1960); Wikidata Q155 (Brazil) P36 = Q2844 (Brasília)
verification_source_url
https://raw.githubusercontent.com/factbook/factbook.json/master/south-america/br.json ; https://www.wikidata.org/wiki/Q155#P36
agreement
diverges
explanation
Brazil's live Factbook record (south-america/br.json) gives Government.Capital.name = 'Brasília' (Brasília). Live Wikidata Q155 P36 independently resolves to Q2844, labeled 'Brasília'. Rio de Janeiro was Brazil's capital for nearly two centuries but was deliberately replaced by the purpose-built city of Brasília in 1960 to shift development inland; this is a genuinely common, dated misconception (correct until 65 years ago) rather than a made-up trap.
grading_mode
exact
difficulty
easy
tags
[
  "capitals",
  "brazil",
  "common-misconception"
]
model_tested
claude-sonnet-5
model_question
What is the capital city of Brazil?
model_response
Brasília is the capital of Brazil.
model_verdict
correct
model_grading_note
Ground truth diverges from claim and confirms Brasília as actual capital, matching model's answer.
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