Assertion: sperm whale | /r/HasProperty | hunted for their oil
Facets:
value: since the mid-18th century
type: TEMPORAL
value: a practice that went
type: TEMPORAL
value: relentlessly
type: MANNER
Source sentences:
text: Sperm whales have been hunted for their oil since the mid-18th century, and after serious population declines between the 1950s and 1980s, this species is now protected.
text: The sperm whale was hunted for centuries for oil taken from reservoirs in its massive head and rendered from its blubber.
text: During the 19th and 20th centuries, sperm whales were relentlessly hunted for their oil and blubber, a practice that went into decline by the close of the 1980s.