Subject	alkane
Predicate	be separated by
Object	fractional distillation
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.6709
Neighborhood Sigma	0.6709
Local Sigma	0.9066
Example Sentences	Sentence Occurrences Source alkanes are separated by fractional distillation 4 Google Autocomplete, Answers.com Questions