Subject	production possibility curve
Predicate	has_property
Object	concave
Modality	Modality Occurrences some[subj/a typical] 3 TBC[why concave] 1 some[subj/why] 1
Polarity	POSITIVE
Plausibility	0.6331
Neighborhood Sigma	0.6710
Local Sigma	0.6997
Example Sentences	Sentence Occurrences Source production possibility curve is a concave 6 Google Autocomplete production possibility curve is concave 4 Google Autocomplete why production possibility curve is concave 2 Google Autocomplete the production possibility curve is concave 3 Google Autocomplete a typical production possibility curve is concave 3 Google Autocomplete