Task: Explanation
Input (English): Gregg Charles Popovich (born January 28, 1949) is an American basketball coach who is currently the head coach of the San Antonio Spurs of the National Basketball Association (NBA). Taking over as coach of the Spurs in 1996, Popovich is the longest tenured active coach in both the NBA and all US major sports leagues. He is often referred to as "Coach Pop" or simply "Pop." Question: What coaching position did the Spurs-Suns rivalry allegedly prevent ''Coach Pop'' from acquiring? Answer: Basketball team in the 2008 Summer Olympics
Output (English):  He is often referred to as Coach Pop or simply Pop.