Assertion: mallard | /r/CapableOf | play key role
Facets:
value: in keeping wetland plant communities
type: TRANSITIVE-OBJECT
value: according to a new study
type: OTHER
Source sentences:
text: But there’s another reason for giving these ubiquitous ducks another look, or at least an appreciative pause: Mallards play a key role in keeping wetland plant communities diverse and healthy, according to a new study out of Europe.