Assertion: gull's back | /r/HasProperty | pale gray
Facets:
value: during the summer months
type: TEMPORAL
Source sentences:
text: The upper parts of a little gull are mantel, the back and upperparts are pale gray and there is a white trailing edge.
text: During the summer months, the adult's back and wings are pale gray, and the trailing edge of their wings is white, with a black wing-tip.