Assertion: herring gull | /r/HasProperty | experiencing reproductive failure
Facets:
value: in early 1970s
type: TEMPORAL
value: in the mid-1960s
type: TEMPORAL
Source sentences:
text: In the mid-1960s and early 1970s, Herring Gulls nesting on the Great Lakes were found to be experiencing reproductive failure—although there were lots of nests, there were hardly any chicks to be found.