Subject	airplane blind
Predicate	must be
Object	open
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.7609
Neighborhood Sigma	0.7933
Local Sigma	1.0000
Example Sentences	Sentence Occurrences Source airplane blinds must be open and setbacks must be in upright position during take-off and landing 1 Yahoo Questions