Assertion: peregrine falcon's population | /r/AtLocation | steep decline
Facets:
value: during the mid-20th century
type: TEMPORAL
Source sentences:
text: Peregrine populations were in steep decline during the mid-20th century, and in the United States these beautiful falcons became an endangered species.
text: Peregrine populations were in steep decline during the mid-20th century, and in the United States these beautiful falcons became an endangered species.