Assertion: pacific gull | /r/CapableOf | become difficult
Facets:
value: usually
type: DEGREE
value: by its fourth year
type: TEMPORAL
Source sentences:
text: Young birds are mottled-brown all over, and attain their adult plumage only gradually; by its fourth year, a young Pacific gull has usually become difficult to tell apart from an adult bird.
text: Young birds are mottled-brown all over, and attain their adult plumage only gradually: by its fourth year, a young Pacific Gull has usually become difficult to tell apart from an adult bird.