Subject	cfc
Predicate	contribute
Object	to the greenhouse effect
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.9475
Neighborhood Sigma	0.9713
Local Sigma	0.9741
Example Sentences	Sentence Occurrences Source cfcs contribute to the greenhouse effect 1 Google Autocomplete cfc contribute to the greenhouse effect 1 Google Autocomplete