Assertion: spinach's level | /r/CapableOf | render much of the iron
Facets:
value: in spinach
type: LOCATION
value: by the body
type: MANNER
Source sentences:
text: However, spinach contains iron absorption-inhibiting substances, including high levels of oxalate, which can bind to the iron to form ferrous oxalate and render much of the iron in spinach unusable by the body.