Subject	radioisotope
Predicate	be used
Object	treat
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.0392
Neighborhood Sigma	0.0392
Local Sigma	0.2930
Example Sentences	Sentence Occurrences Source radioisotopes are used to treat cancer 3 Google Autocomplete, Answers.com Questions