Assertion: spinach's value | /r/HasProperty | demonstrated
Facets:
Source sentences:
text: While the nutritional value of chaya has been demonstrated, there are many therapeutic and medicinal claims about chaya leaves that have yet to be substantiated.
text: While the nutritional value of chaya has been demonstrated (Martin and Ruberte 1978; Booth et al. 1992), none of the purported therapeutic values of chaya leaves has been substantiated with scientific experimentation.