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Sentence
Span Details
守秘義務
duty of confidentiality; obligation to keep secretsnoun
契約
contract; agreementnoun, suru verb
に
direction, time, indirect object, or target markergrammar
サイン
autograph; signature; sign; signal; indicationnoun, suru verb
し
light/support verb with a noun or noun-like phrase-> するgrammar
ました。
polite pastgrammar