Assertion: duck's population | /r/CapableOf | expand their range
Facets:
value: by more than 500 km
type: OTHER
value: northwards
type: MANNER
value: since the early 20th century
type: TEMPORAL
value: in reaction to global warming
type: CAUSE
Source sentences:
text: The northernmost populations have expanded their range northwards by more than 500 km since the early 20th century, possibly in reaction to global warming.