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Sentence
Span Details
古生物学
paleontologynoun
の
possession, attribution, nominalizer, or nominal linkergrammar
研究
research; study; investigationnoun, suru verb
に
direction, time, indirect object, or target markergrammar
は
topic markergrammar
化石
fossil; fossilization; petrificationnoun, suru verb
の
possession, attribution, nominalizer, or nominal linkergrammar
発掘
excavation; digging up; exhumation; discovery; finding; unearthing (talent, fact)noun, suru verb
が
subject markergrammar
欠かせない。
indispensable; essential; vital; crucialexpression, i-adjective