Subject	polycythemia
Predicate	occur
Object	in copd
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.3601
Neighborhood Sigma	0.4283
Local Sigma	0.6976
Example Sentences	Sentence Occurrences Source polycythemia occur in copd 2 Google Autocomplete, Answers.com Questions