Assertion: emperor penguin | /r/AtLocation | captivity
Facets:
value: since the 1930s
type: TEMPORAL
Source sentences:
text: Emperor penguins have been kept in captivity since the 1930s, but only successfully bred since the 1980s.
text: Emperor penguins have been kept in captivity since the 1930s, but only successfully bred since the 1980s.