Subject	blackhead
Predicate	form on
Object	back
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.8860
Neighborhood Sigma	0.8860
Local Sigma	1.0000
Example Sentences	Sentence Occurrences Source blackheads form on the back 2 Google Autocomplete blackheads form on back 2 Google Autocomplete