Analyzer
Sentence analysis
11Spans
Sentence
Span Details
調査
investigation; examination; inquiry; surveynoun, suru verb
では
contrastive で + は; then; well thengrammar
任意
optional; voluntary; any; arbitraryno-adjective, noun
抽出法
sampling method; sampling; extraction methodnoun
を
object markergrammar
用い
use; make use of; utilize-> 用いるichidan verb
て
connective te-formgrammar
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