[
  "https://en.wikipedia.org/wiki/ChatGPT",
  "https://www.history.com/this-day-in-history/november-30/chatgpt-released-openai"
]

{
  "source_url": "https://www.wikidata.org/wiki/Q115564437#P577",
  "source_value": "Wikidata ChatGPT entity, P577 (publication date) = 2022-11-30, cited to techopedia.com",
  "agreement_with_first_source": "match",
  "explanation": "Checked via Groundtruth's wikidata.mjs client (P577 on ChatGPT's Wikidata entity, Q115564437). The structured value is 2022-11-30, exactly matching the claim and the original source_urls. Genuine second independent source: Wikidata's own citation (techopedia.com) is a different URL than either of the original two sources."
}

[
  "ai-tech",
  "openai",
  "2020s"
]

[
  "https://www.tomshardware.com/tech-industry/nvidia-is-now-worlds-most-valuable-company-by-market-cap-ahead-of-apple-microsoft-and-google",
  "https://en.wikipedia.org/wiki/List_of_public_corporations_by_market_capitalization"
]

{
  "source_url": "https://www.wikidata.org/wiki/Q182477#P2226",
  "source_value": "Wikidata Nvidia entity P2226 (market capitalization) snapshots: $591.05B (2022-02-18), $2.962T (2025-03-24), $2.723T (2025-05-01), $4.752T (2026-02-25, preferred) -- no snapshot exists near June 18, 2024",
  "agreement_with_first_source": "unverifiable",
  "explanation": "Queried Nvidia's real Wikidata market-cap history via P2226. Wikidata stores only sparse, irregularly-dated snapshots (sourced to Yahoo Finance/Forbes/Nasdaq at the moment each was added), not a continuous time series, so there is no data point anywhere near June 18, 2024 to confirm or contradict the specific 'surpassed Apple and Microsoft on this exact date' claim. This is an honest structural limitation of Wikidata for date-precise financial claims, not a false result -- recorded as unverifiable rather than forced."
}

[
  "ai-tech",
  "nvidia",
  "microsoft",
  "2020s"
]

[
  "https://en.wikipedia.org/wiki/Removal_of_Sam_Altman_from_OpenAI",
  "https://www.pbs.org/newshour/nation/sam-altman-reinstated-as-openai-ceo-with-new-board-replacing-the-one-which-fired-him"
]

{
  "source_url": "https://www.wikidata.org/wiki/Q21708200#P169",
  "source_value": "Wikidata OpenAI entity, all P169 (CEO) statements: Sam Altman (normal, start 2019-03) -> Mira Murati (normal, start 2023-11-17) -> Emmett Shear (normal, start 2023-11-19) -> Sam Altman (preferred, start 2023-11-22)",
  "agreement_with_first_source": "match",
  "explanation": "Pulled every rank of OpenAI's P169 statement (not just the top-ranked one) via wikidata.mjs's getClaim(). Wikidata's full CEO history independently corroborates the claim in detail: Altman was replaced starting 2023-11-17 (the firing date), passed through Mira Murati and then Emmett Shear as interim CEOs, and was reinstated as the preferred-rank CEO on 2023-11-22 -- five days later, matching 'within a week.' A genuinely independent, more granular confirmation than the original two news-article sources."
}

[
  "ai-tech",
  "openai",
  "2020s"
]

[
  "https://www.cnbc.com/2023/07/24/elon-musk-rebrands-twitter-to-x-replaces-iconic-bird-logo.html",
  "https://www.nbcnews.com/news/us-news/twitter-rebrands-x-elon-musk-loses-iconic-bird-logo-rcna95880"
]

{
  "source_url": "https://www.wikidata.org/wiki/Q117617480#P571",
  "source_value": "Wikidata 'X Corp' entity: P571 (inception) = 2023-03-09 (the Delaware legal-entity merger of Twitter Inc into X Corp), P1365 (replaces) = Twitter, cited to independent.co.uk",
  "agreement_with_first_source": "diverges",
  "explanation": "Wikidata models a real but DIFFERENT date than the claim: X Corp's inception as a legal entity is dated 2023-03-09 (a corporate restructuring, first reported when an unrelated lawsuit surfaced it in April 2023), not July 2023, when Musk publicly announced the brand/logo rebrand. Both dates are real and independently documented, but they describe two different events (legal entity formation vs. public brand change) -- recording this as 'diverges' because Wikidata's structured date for X Corp's existence does not match the claim's July 2023 date, which is an important nuance a naive single-property lookup would miss."
}

[
  "ai-tech",
  "musk",
  "twitter-x",
  "2020s"
]