Assertion: milkweed | /r/CapableOf | serve as host plants
Facets:
value: for certain butterflies
type: TRANSITIVE-OBJECT
Source sentences:
text: They're an important nectar source for bees and other insects, and serve as host plants for certain butterflies.
text: Milkweed not only offers a nice variety of color, but it also serves as a nectar source and a host plant.