Subject	human
Predicate	affect
Object	food web
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.2609
Neighborhood Sigma	0.2609
Local Sigma	0.4318
Example Sentences	Sentence Occurrences Source humans affect the food chains and food webs 2 Answers.com Questions humans affect the food web 2 Answers.com Questions