Subject	forest fire
Predicate	has_trait
Object	helpful
Modality	Modality Occurrences some[subj/lightning induced] 1
Polarity	POSITIVE
Plausibility	0.9452
Neighborhood Sigma	0.9588
Local Sigma	0.9452
Example Sentences	Sentence Occurrences Source forest fires are helpful 4 Google Autocomplete lightning induced forest fires can be helpful 1 Google Autocomplete forest fires are helpful in succession 1 Answers.com Questions