Assertion: city's origin | /r/HasProperty | uncertain
Facets:
Source sentences:
text: The origin of the name Kazan is uncertain.
text: The origin of the Aztec people is uncertain, but elements of their own tradition suggest that they were a tribe of hunters and gatherers on the northern Mexican plateau before their appearance in Mesoamerica in perhaps the 12th century ce; Aztlán, however, may be legendary.
text: The origin of the name is uncertain.