Subject	westward expansion
Predicate	be
Object	a cause of starting the civil war
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.5455
Neighborhood Sigma	0.6374
Local Sigma	1.0000
Example Sentences	Sentence Occurrences Source westward expansion was a cause of starting the civil war 1 Answers.com Questions