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Sentence

彼かれらは古ふるい洞どう窟くつを探たん検けんした。

Span Details

古ふるい

old; aged; antique

i-adjective

洞どう窟くつ

cave; cavern; grotto

探たん検けん

exploration; expedition

noun, suru verb

light/support verb with a noun or noun-like phrase

-> するgrammar