Assertion: heron's feather | /r/HasProperty | blue
Facets:
Source sentences:
text: They gradually grow their blue feathers over their first year, resulting in a mottled blue and white pattern during this time.
text: The body of the Great Blue Heron offers feathers that are gray, blue, and white.
text: They gradually grow their blue feathers over their first year, resulting in a mottled blue and white pattern during this time.