Assertion: blackbird's foot | /r/HasProperty | 4.5 to 18 meters
Facets:
Source sentences:
text: When it is time to have offspring, a mating pair will build a nest 15 to 60 feet (4.5 to 18 meters) above the ground using branches, twigs, hair, twine, bark, plant fibers, mosses, cloth and other materials.