Question: When did the conference the UNLV Runnin' Rebels are a member of begin operations?
Sentence (from "2017–18 UNLV Runnin' Rebels basketball team"): The 2017–18 UNLV Runnin' Rebels basketball team will represent the University of Nevada, Las Vegas during the 2017–18 NCAA Division I men's basketball season.
Relevant evidence: No