Assertion: fur seal | /r/HasProperty | extinct
Facets:
value: for over 50 years
type: TEMPORAL
value: by the early 1900s
type: TEMPORAL
Source sentences:
text: In fact, by the early 1900s, fur seals were thought to be extinct.
text: For over 50 years, the fur seals of Guadeloupe were thought to be extinct.