AnalyzerSentence analysis6SpansSentence酸素は生命に不可欠だ。1000 character limitAnalyzeSentence酸さん素そは生せい命めいに不ふ可か欠けつだ。Span Details酸さん素そoxygennounはtopic markergrammar生せい命めいlife; existence; working life; career; life force; lifeblood; soul; essencenoun, noun suffixにdirection, time, indirect object, or target markergrammar不ふ可か欠けつindispensable; essential; vitalna-adjective, nounだ。plain copulagrammar