Subject	ancient mesopotamia
Predicate	be referred
Object	as the cradle of civilization
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.8672
Neighborhood Sigma	1.0000
Local Sigma	0.8953
Example Sentences	Sentence Occurrences Source ancient mesopotamia is referred to as the cradle of civilization 2 Google Autocomplete