Subject	human activity
Predicate	produce
Object	greenhouse gases
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.9141
Neighborhood Sigma	0.9311
Local Sigma	0.9142
Example Sentences	Sentence Occurrences Source human activity produce greenhouse gases 2 Google Autocomplete human activities produce greenhouse gases 2 Google Autocomplete, Answers.com Questions