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Sentence analysis
6Spans
Sentence
Span Details
事故
accident; incident; trouble; circumstances; reasonsnoun
の
possession, attribution, nominalizer, or nominal linkergrammar
原因
cause; origin; sourcenoun, suru verb
が
subject markergrammar
判明
become clear; be identified; turn out to benoun, suru verb
した。
light/support verb with a noun or noun-like phrase-> するgrammar