Subject	american alligator
Predicate	has_property
Object	keystone species
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.0052
Neighborhood Sigma	0.0055
Local Sigma	0.0059
Example Sentences	Sentence Occurrences Source american alligators are a keystone species 3 Google Autocomplete the american alligator is a keystone species 2 Google Autocomplete