Subject	radioactivity
Predicate	be important to
Object	study of nuclear radiation
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.0018
Neighborhood Sigma	0.0019
Local Sigma	1.0000
Example Sentences	Sentence Occurrences Source radioactivity is important to the study of nuclear radiation 1 Answers.com Questions