Complex sentence: With the opening of the Oakland Coliseum Arena in 1966, the Warriors began scheduling increasing numbers of home games there and the 1970--71 season would be the team's last as the San Francisco Warriors.
Split into simpler sentences: With the opening of the Oakland Coliseum Arena in 1966, the Warriors began scheduling increasing numbers of home games at that venue. The 1970--71 season would be the team's last as the San Francisco Warriors.