Assertion: walrus | /r/HasProperty | exploited by american and european sealers
Facets:
value: in the 18th and 19th centuries
type: TEMPORAL
value: heavily
type: DEGREE
Source sentences:
text: In the 18th and 19th centuries, the walrus was heavily exploited by American and European sealers and whalers, leading to the near-extirpation of the Atlantic subspecies.
text: In the 18th and 19th centuries, the walrus was heavily exploited by American and European sealers and whalers, leading to the near extirpation of the Atlantic population.