Analyzer
Sentence analysis
9Spans
Sentence
Span Details
調査
investigation; examination; inquiry; surveynoun, suru verb
で
location, means, or scope markergrammar
地下
underground; below the ground; the grave; world of the dead; underground (activities); secret; illegalnoun, no-adjective
に
direction, time, indirect object, or target markergrammar
大きな
big; large; greatpre-noun adjective
空洞
cavity; hollow; cavern; cavernousnoun, no-adjective
が
subject markergrammar
見つかっ
be found; be discovered; turn up-> 見つかるgodan verb
た。
past tense or completed actiongrammar