Original sentence: After four years of an ongoing organizational dispute and "split" in Indy car racing, Chip Ganassi Racing became the first CART-based team to compete at the race since 1995, competing as a one-off entry sanctioned by the IRL
Edited sentence: " They arrived to compete in the Indianapolis 500 as a one-off entry which was sanctioned by the rival IRL.After four years of an ongoing organizational dispute and "split" in Indy car racing, Chip Ganassi Racing, a CART-based team, became the first team to cross the proverbial "picket line