Assertion: taro's tuber | /r/HasProperty | source
Facets:
value: for the extraction of diosgenin
type: PURPOSE
Source sentences:
text: The tubers of certain wild yams, including a variant of 'Kokoro' yam and other species of Dioscorea, such as Dioscorea nipponica, are a source for the extraction of diosgenin, a steroid sapogenin.