Wikidata Identitäts-Snapshot T+0 — 2026-05-11 (Marin T. Kael Research Programme)

Wikidata identity snapshot at the T+0 baseline of the Marin T. Kael Research Programme — KI-Zitations-Feldlabor (AI Citation Behavior Lab). Two Wikidata items: Q139720807 (the author identity) and Q139720798 (the debut work 'Das vierte Feld'). The bundle contains: (a) full EntityData JSON exports of both items at the cut-off date, (b) a SPARQL-results JSON listing all direct properties of both items with DE/EN labels, (c) a README documenting purpose, file contents and reproduction commands. Serves as ground-truth-anchor reference for all subsequent Wikidata-coverage measurements during the Phase-1 observation window (11 May 2026 to 22 September 2026, 134 days). Specifically used to test hypothesis H-Q0-INST-05 (Wikidata coverage of the person+work cluster remains stable above 0.85 across the window). License CC0 1.0 (Wikidata data is dedicated to the public domain). Programme home: https://marin-t-kael.de/research.