AnalyzerSentence analysis4SpansSentence約束は約束だ。1000 character limitAnalyzeSentence約やく束そくは約やく束そくだ。Span Details約やく束そくpromise; agreement; one's word; contract; appointment; engagement; date; convention; rule; destiny; fatenoun, suru verbはtopic markergrammar約やく束そくpromise; agreement; one's word; contract; appointment; engagement; date; convention; rule; destiny; fatenoun, suru verbだ。plain copulagrammar