Subject	pigment
Predicate	be needed for
Object	photosynthesis
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.7086
Neighborhood Sigma	0.7626
Local Sigma	0.7121
Example Sentences	Sentence Occurrences Source pigments are needed for photosynthesis 5 Google Autocomplete, Answers.com Questions