Subject	oxygen tank
Predicate	has_property
Object	necessary
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.0006
Neighborhood Sigma	0.0007
Local Sigma	0.0006
Example Sentences	Sentence Occurrences Source oxygen tank is necessary 1 Google Autocomplete a oxygen tank is necessary 1 Google Autocomplete