What building, at one time, housed the MLB Astros, NFL Oilers, NBA Rockets and hosted the UCLA Bruins men's basketball team when they won the Championship in 1971?
1970–71 UCLA Bruins men's basketball team: The 1970–71 UCLA Bruins men's basketball team won the National Collegiate Champion again on March 13, 1971, in the Astrodome Houston, Texas. Astrodome: The NRG Astrodome, also known as the Houston Astrodome or simply The Astrodome, is the world's first multi-purpose, domed sports stadium, located in Houston, Texas. Astrodome:  It served as home to the Houston Astros of Major League Baseball (MLB) from its opening in 1965 until 1999, and the home to the Houston Oilers of the National Football League (NFL) from 1968 until 1996, and also the part-time home of the Houston Rockets of the National Basketball Association (NBA) from 1971 until 1975.
The Astrodome