AnalyzerSentence analysis8SpansSentence経済学では希少性が重要な概念だ。1000 character limitAnalyzeSentence経けい済ざい学がくでは希き少しょう性せいが重じゅう要ような概がい念ねんだ。Span Details経けい済ざい学がくeconomicsnounではcontrastive で + は; then; well thengrammar希き少しょう性せいscarcity; raritynounがsubject markergrammar重じゅう要ようimportant; essential; significantna-adjectiveなadnominal form of the copula after a na-adjectivegrammar概がい念ねんconcept; notion; general ideanounだ。plain copulagrammar