Assertion: citrus fruit's vitamin c | /r/HasProperty | key
Facets:
value: in a balanced, healthy diet
type: OTHER
value: to preventing this widespread condition
type: TRANSITIVE-OBJECT
value: to good health
type: PURPOSE
Source sentences:
text: Citrus fruits are well-known sources of vitamin C, which is key to good health.
text: It was discovered that vitamin C was the key to preventing this widespread condition.
text: Vitamin C, Vitamin A and potassium are key in a balanced, healthy diet.