Assertion: pigeon's population | /r/CapableOf | decline by 46%
Facets:
value: between 1966
type: TEMPORAL
value: between 2015
type: TEMPORAL
Source sentences:
text: Conservation Rock Pigeons are abundant and widespread, so it may come as a surprize to learn that North American populations declined by 46% between 1966 and 2015, according to the North American Breeding Bird Survey.