Subject	plate boundary
Predicate	produce
Object	destructive plate boundary
Modality	Modality Occurrences some[subj/a constructive] 1
Polarity	POSITIVE
Plausibility	0.0003
Neighborhood Sigma	0.0044
Local Sigma	1.0000
Example Sentences	Sentence Occurrences Source a constructive plate boundary produce a shield shape and a destructive plate boundary produce a cone shape 1 Answers.com Questions