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Sentence analysis
12Spans
Sentence
Span Details
動物行動学
ethologynoun
の
possession, attribution, nominalizer, or nominal linkergrammar
研究
research; study; investigationnoun, suru verb
に
direction, time, indirect object, or target markergrammar
は
topic markergrammar
長期間
long period; long term; extended periodnoun, adverb, no-adjective
の
possession, attribution, nominalizer, or nominal linkergrammar
野外
outdoors; open air; outside; fields; outskirts; suburbsnoun, no-adjective
観察
observation; watching; surveynoun, suru verb
が
subject markergrammar
必要
necessary; needed; essential; necessity; need; requirementna-adjective, noun
だ。
plain copulagrammar