Assertion: petrel's population | /r/HasProperty | concentrated in the north-west of the island
Facets:
value: due to the various threats
type: CAUSE
Source sentences:
text: Due to the various threats that face this species, the main populations on Kauaʻi are now concentrated in the north-west of the island in areas such as Upper Limahuli Preserve and Hono O Nā Pali NAR.