Subject	plate tectonics
Predicate	play
Object	a role in the formation of volcanoes
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.9433
Neighborhood Sigma	0.9461
Local Sigma	1.0000
Example Sentences	Sentence Occurrences Source plate tectonics play a role in the formation of volcanoes 1 Google Autocomplete plate tectonics play a role in the formation and eruptions of volcanoes 1 Answers.com Questions