AnalyzerSentence analysis6SpansSentence持続可能なエネルギー源が必要です。1000 character limitAnalyzeSentence持じ続ぞく可か能のうなエネルギー源げんが必ひつ要ようです。Span Details持じ続ぞく可か能のうsustainablena-adjectiveなadnominal form of the copula after a na-adjectivegrammarエネルギー源げんenergy sourcenounがsubject markergrammar必ひつ要ようnecessary; needed; essential; necessity; need; requirementna-adjective, nounです。be; is; arecopula, auxiliary出洲ですspit of land; sandspit