Assertion: blackbird's nest | /r/MadeOf | grass
Facets:
value: often
type: TEMPORAL
value: entirely
type: DEGREE
Source sentences:
text: The nest is often made entirely of grass, but may include pine needles, mosses, rootlets, aquatic plants, animal hair, and artificial materials like cellophane or cigarette filters.
text: The cup-shaped nest is made with grasses, leaves and other vegetation, bound together with mud.