Subject	zircon
Predicate	be used to
Object	date rocks
Modality	Modality Occurrences TBC[date igneous rocks] 2
Polarity	POSITIVE
Plausibility	0.8209
Neighborhood Sigma	0.8508
Local Sigma	1.0000
Example Sentences	Sentence Occurrences Source zircon is used to date igneous rocks 2 Google Autocomplete, Answers.com Questions zircon is used to date rocks 2 Reddit Questions