Analyzer
Sentence analysis
8Spans
Sentence
Span Details
理論
theorynoun
を
object markergrammar
裏打ち
lining; backing; support; backing up; bolsteringnoun, suru verb
する
light/support verb with a noun or noun-like phrasegrammar
証拠
evidence; proofnoun
が
subject markergrammar
必要
necessary; needed; essential; necessity; need; requirementna-adjective, noun
だ。
plain copulagrammar