Assertion: booby's foot | /r/HasProperty | gray
Facets:
Source sentences:
text: The legs and feet were gray, including the webbed toes.
text: The Peruvian booby is similar in appearance but has grey feet, whiter head and neck, and white spots on its wing coverts.
text: Bill, legs, and feet are gray.
text: Their feet are white or gray; the blue only develops later.