Subject	hot air
Predicate	be heavier than
Object	cold air
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.8317
Neighborhood Sigma	0.8389
Local Sigma	1.0000
Example Sentences	Sentence Occurrences Source hot air is heavier than cold air 6 Google Autocomplete, Answers.com Questions