Assertion: joshua tree's root | /r/HasProperty | rich
Facets:
value: in saponins
type: LOCATION
Source sentences:
text: The roots are rich in saponins and can be used as a soap substitute.
text: That said there are many yucca plant uses, for example: the roots of Yucca elata (soaptree yucca), are rich in saponins and are used in Native American rituals as a shampoo.
text: The roots are rich in saponins and can be used as a soap substitute.