Analyzer
Sentence analysis
7Spans
Sentence
Span Details
覆面
mask; veil; disguise; anonymous; unmarked; incognitonoun, suru verb, no-adjective, noun-modifying
警官
police officer; policeman; constablenoun
が
subject markergrammar
おとり捜査
sting operation; undercover investigationnoun
に
direction, time, indirect object, or target markergrammar
参加
participation; joining; entrynoun, suru verb
した。
light/support verb with a noun or noun-like phrase-> するgrammar