Assertion: soybean's isoflavone | /r/HasProperty | a type of phytoestrogen
Facets:
Source sentences:
text: Soy-based foods like tofu and soy milk contain chemicals known as isoflavones, a type of phytoestrogen.
text: That's because soy contains isoflavones — a type of phytoestrogren that mimics the effect of estrogen on the body.