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Sentence analysis
8Spans
Sentence
Span Details
調査
investigation; examination; inquiry; surveynoun, suru verb
では
contrastive で + は; then; well thengrammar
無作為抽出
random samplingnoun
で
location, means, or scope markergrammar
回答者
respondent; person who answersnoun
を
object markergrammar
選ん
choose; select; pick-> 選ぶgodan verb
だ。
past tense or completed action-> たgrammar