Subject	roller
Predicate	reduce
Object	friction
Modality	Modality Occurrences some[subj/wheels and] 1
Polarity	POSITIVE
Plausibility	0.9349
Neighborhood Sigma	1.0000
Local Sigma	0.9355
Example Sentences	Sentence Occurrences Source rollers reduce friction 6 Google Autocomplete, Answers.com Questions wheels and rollers reduce friction 2 Google Autocomplete