Question: What is the name of the rivalry game that is played in the same stadium as the State Fair Classic, thats name is derived from the river that forms part of the boundary between Texas and Oklahoma?
Sentence (from "State Fair Classic"): The game often occurs the weekend before the Oklahoma–Texas Red River Showdown game; the new Texas State Fair Football Showdown is also scheduled to take place on the third weekends of the 2018 and 2019 fairs and will feature Southern and Texas Southern.
Relevant evidence: No