Assertion: gull's number | /r/CapableOf | fall by 88%
Facets:
value: between 1997
type: TEMPORAL
value: between 2015
type: TEMPORAL
Source sentences:
text: The national population trend for the Lesser Black-backed Gull is less clear, but large drops have been recorded at nationally important (and protected) breeding colonies, such as South Walney in Cumbria, where numbers fell by 88% between 1997 and 2015.