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Sentence

発はつ病びょうの原げん因いんはまだわかっていない。

Span Details

発はつ病びょう

onset of illness; falling ill

noun, suru verb

possession, attribution, nominalizer, or nominal linker

原げん因いん

cause; origin; source

noun, suru verb

adverb, na-adjective

become clear; be known; turn out

-> 分かるgodan verb, interjection

ongoing or resultant state

-> ているgrammar

negative auxiliary