Subject	ph meter
Predicate	be calibrated before
Object	use
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.6294
Neighborhood Sigma	0.6547
Local Sigma	1.0000
Example Sentences	Sentence Occurrences Source a ph meter is calibrated before use 6 Google Autocomplete a ph meter need to be calibrated with buffers before use 2 Google Autocomplete