Assertion: trumpeter swan's nest | /r/HasProperty | small mound of plant material
Facets:
value: several centimeters in diameter
type: OTHER
value: with a depression in the center
type: OTHER
Source sentences:
text: The nest (constructed by both sexes, although the female usually does much of the work) is a small mound of plant material several centimeters in diameter, with a depression in the center.