AnalyzerSentence analysis3SpansSentence難解な理論1000 character limitAnalyzeSentence難なん解かいな理り論ろんSpan Details難なん解かいdifficult to understand; abstruse; unintelligiblena-adjective, nounなadnominal form of the copula after a na-adjectivegrammar理り論ろんtheorynoun