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Sentence analysis
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Sentence
Span Details
県警
prefectural policenoun
と
quotation, conditional, companion, or and markergrammar
警視庁
Tokyo Metropolitan Police Department; Metropolitan Police Departmentnoun
が
subject markergrammar
共同捜査
joint investigationnoun
を
object markergrammar
始め
start; begin; commence; start up; open; establish; start to ...; begin to ...-> 始めるichidan verb, auxiliary
た。
past tense or completed actiongrammar