Analyzer
Sentence analysis
8Spans
Sentence
Span Details
四色問題
four-color problem; four-color map problemnoun
は
topic markergrammar
グラフ理論
graph theorynoun
の
possession, attribution, nominalizer, or nominal linkergrammar
有名
famous; well-knownna-adjective
な
adnominal form of the copula after a na-adjectivegrammar
未解決問題
unresolved problem; open questionnoun
だった。
past copulagrammar