Subject	human
Predicate	can change
Object	ecosystem
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.7772
Neighborhood Sigma	0.7772
Local Sigma	1.0000
Example Sentences	Sentence Occurrences Source humans can change an ecosystem 4 Google Autocomplete humans can change ecosystems 2 Answers.com Questions