Assertion: petrel's population | /r/HasProperty | cause
Facets:
value: at a number of breeding sites
type: LOCATION
value: for concern
type: PURPOSE
Source sentences:
text: Increased populations of western gulls, predators of ashy storm-petrels, at a number of breeding sites are cause for concern.
text: Increased populations of western gulls, predators of ashy storm-petrels, at a number of breeding sites are cause for concern.