Assertion: passenger pigeon | /r/HasProperty | a keystone species
Facets:
value: for the whole eastern deciduous forest
type: TRANSITIVE-OBJECT
value: from the deep south
type: LOCATION
value: from the mississippi
type: LOCATION
Source sentences:
text: The passenger pigeon was a keystone species for the whole eastern deciduous forest, from the Mississippi to the Atlantic, from the Deep South clear up into Canada.