Subject	mammal
Predicate	has_body_part
Object	heart
Modality	Modality Occurrences TBC[4-chambered hearts] 2 some[subj/birds and] 2
Polarity	POSITIVE
Plausibility	0.9599
Neighborhood Sigma	0.9599
Local Sigma	0.9599
Example Sentences	Sentence Occurrences Source mammals is heart 4 Google Autocomplete mammals have a heart 4 Google Autocomplete birds and mammals have 4-chambered hearts 2 Google Autocomplete mammals have hearts with two separate sides 1 Answers.com Questions