Subject photosynthesis
Predicate be necessary for
Object life on earth
Modality
Modality Occurrences
Polarity POSITIVE
Plausibility 0.7361
Neighborhood Sigma 0.7361
Local Sigma 1.0000
Example Sentences
Sentence Occurrences Source
photosynthesis is necessary for life on earth 4 Google Autocomplete, Answers.com Questions