Analyzer
Sentence analysis
8Spans
Sentence
Span Details
彼
he; him; boyfriendpronoun
は
topic markergrammar
南極圏
Antarctic Circle; the Antarcticnoun
の
possession, attribution, nominalizer, or nominal linkergrammar
調査
investigation; examination; inquiry; surveynoun, suru verb
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