Subject	volcano
Predicate	has_property
Object	extreme environment
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.8864
Neighborhood Sigma	0.8864
Local Sigma	1.0000
Example Sentences	Sentence Occurrences Source volcanoes are extreme environments 5 Google Autocomplete volcanoes are an extreme environment 5 Google Autocomplete a volcano is an extreme environment 3 Google Autocomplete an volcano is an extreme environment 1 Answers.com Questions volcano is an extreme environment 1 Answers.com Questions