Subject	gravity
Predicate	keep planets in
Object	orbit around sun
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.0040
Neighborhood Sigma	0.0040
Local Sigma	1.0000
Example Sentences	Sentence Occurrences Source gravity keeps the planets in orbit around the sun 1 Answers.com Questions gravity keeps the planets in orbits around the sun 1 Answers.com Questions