Assertion: viper | /r/HasProperty | pit vipers
Facets:
value: according to the university of pittsburgh
type: OTHER
Source sentences:
text: All vipers in the Americas are pit vipers, according to The University of Pittsburgh.
text: Vipers can be found in Asia, Africa, Europe, and the Americas, and there are several viper subfamilies, including the Crotalinae, or pit vipers.