Subject	volcano
Predicate	form at
Object	convergent plate boundaries
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.9155
Neighborhood Sigma	0.9155
Local Sigma	1.0000
Example Sentences	Sentence Occurrences Source volcanoes form at convergent plate boundaries 4 Google Autocomplete volcanoes form at both convergent plate boundaries and divergent plate boundaries 1 Answers.com Questions