Assertion: whale | /r/AtLocation | serious danger of extinction
Facets:
value: by the early 20th century
type: TEMPORAL
Source sentences:
text: These whales were once the target of extensive hunting, and by early in the 20th century they were in serious danger of extinction.
text: These whales were once the target of extensive hunting, and by the early 20th century, they were in serious danger of extinction.