Analyzer
Sentence analysis
8Spans
Sentence
Span Details
彼
he; him; boyfriendpronoun
は
topic markergrammar
整数論
number theorynoun
の
possession, attribution, nominalizer, or nominal linkergrammar
未解決問題
unresolved problem; open questionnoun
に
direction, time, indirect object, or target markergrammar
取り組ん
grapple with; wrestle with; engage in a bout; tackle; work hard on; come to grips with-> 取り組むgodan verb
でいる。
ongoing or resultant state-> ているgrammar