Complex sentence: King Racing bought a 91C and used the Judd VA V8 engine for Australian Geoff Brabham to compete at the 75th Indianapolis 500 in 1991 but he retired with an electrical fault, The team chose not to race in the remainder of the 1991 season.
Split into simpler sentences: King Racing bought a 91C and used the Judd VA V8 engine for Geoff Brabham to compete at the 75th Indianapolis 500 in 1991. He retired from the race with an electrical fault and the team chose not to race in the remainder of the 1991 season.