Subject	volcano
Predicate	occur at
Object	convergent plate boundaries
Modality	Modality Occurrences often 2
Polarity	POSITIVE
Plausibility	0.9371
Neighborhood Sigma	0.9371
Local Sigma	1.0000
Example Sentences	Sentence Occurrences Source volcanoes occur at convergent plate boundaries 5 Google Autocomplete volcanoes often occur at convergent plate boundaries 2 Answers.com Questions