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Sentence analysis
8Spans
Sentence
Span Details
夜間
night; nighttimenoun, adverb
の
possession, attribution, nominalizer, or nominal linkergrammar
警備
security; guard; policingnoun, suru verb
に
direction, time, indirect object, or target markergrammar
は
topic markergrammar
探照灯
searchlightnoun
が
subject markergrammar
欠かせない。
indispensable; essential; vital; crucialexpression, i-adjective