Subject	earthquake
Predicate	happen at
Object	plate boundaries
Modality	Modality Occurrences some[subj/most] 3 TBC[destructive plate boundaries] 3 TBC[constructive plate boundaries] 1
Polarity	POSITIVE
Plausibility	0.8469
Neighborhood Sigma	0.8469
Local Sigma	0.9069
Example Sentences	Sentence Occurrences Source earthquakes happen at plate boundaries 10 Google Autocomplete, Answers.com Questions most earthquakes happen at plate boundaries 3 Google Autocomplete earthquakes happen at destructive plate boundaries 3 Google Autocomplete earthquakes happen at constructive plate boundaries 1 Google Autocomplete