Complex sentence: The duo was used by Bischoff to crash Billy Gunn and Chuck Palumbo's Wedding Commitment Ceremony, after which Billy and Chuck's manager, Rico, began to manage Three Minute Warning.
Split into simpler sentences: The duo was used by Bischoff to crash the wedding commitment ceremony, which was held by Billy Gunn, and Chuck Palumbo. This happened after which Billy and Chuck's manager, Rico, began to manage Three Minute Warning.