Assertion: beaver | /r/CapableOf | work as a keystone species
Facets:
value: in an ecosystem
type: LOCATION
value: by creating wetlands
type: MANNER
Source sentences:
text: The beaver works as a keystone species in an ecosystem by creating wetlands that are used by many other species.
text: The beaver works as a keystone species in an ecosystem by creating wetlands that are used by many other species.