Subject	smallpox vaccine
Predicate	has_property
Object	necessary
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.5802
Neighborhood Sigma	0.7621
Local Sigma	0.5802
Example Sentences	Sentence Occurrences Source smallpox vaccine is necessary 2 Google Autocomplete a smallpox vaccine is necessary 1 Google Autocomplete