Fjelstul World Cup Database
Author: Joshua C. Fjelstul, Ph.D.
© 2023 Joshua C. Fjelstul, Ph.D.
The GitHub database is used under CC BY-SA 4.0. Original repository.
Footbillion modifications include normalized names and missing values, stable entity IDs, completeness checks, original question rules, factual note templates, derived statistics and estimated rarity. Raw source files are preserved. The derived question bank and data are released under CC BY-SA 4.0. The current reviewed release includes pinned official answer-set checks, clarifies group-stage scope in two Champions League prompts and retains pending flags for questions not yet approved.
OpenFootball
Fixture and result data: OpenFootball contributors. football.json repository, released under CC0 1.0. Derived changes include score normalization, season checks, club identity matching and league aggregates.
Wikidata
Structured labels and aliases: Wikidata contributors, under CC0. Identity mappings use pinned records and do not independently certify competition statistics.
Official records
FIFA, UEFA and Premier League records are used for factual corroboration. Their article wording, photographs, videos, logos and trophy imagery are not included or licensed by Footbillion. Linking a record does not imply a partnership.
Original Footbillion work
Question wording, hints, notes, scoring estimates and the derived data compilation are original contributions. No third-party question bank is used as a generation input.
The database is provided as-is and as-available, with no representations or warranties. The original Fjelstul disclaimer and attribution are retained in the data release. Raw CC0 data retains its original permissions.