Assertion: gull | /r/HasProperty | dimorphic
Facets:
value: sexually
type: MANNER
Source sentences:
text: The legs, too, change from black to dark red and even bright red as the breeding season progresses, "possibly stimulated by presence of begging chicks and juveniles.":556 Observations suggest the gull is sexually dimorphic, but there is a lack of published data to support this.:557