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Sentence analysis
9Spans
Sentence
Span Details
舶用
marine; for shipping; for vesselsnoun-modifying
エンジン
enginenoun
の
possession, attribution, nominalizer, or nominal linkergrammar
メンテナンス
maintenancenoun
は
topic markergrammar
専門知識
expertise; specialized knowledge; technical knowledgenoun
が
subject markergrammar
必要
necessary; needed; essential; necessity; need; requirementna-adjective, noun
だ。
plain copulagrammar