Complex sentence: Warnock proved a divisive figure with fans but after a number of mid-table finishes he achieved promotion back to the Premiership in 2006 but the side were relegated the following season, prompting the board not to renew Warnock's contract.
Split into simpler sentences: Warnock proved a divisive figure with fans, but after a number of mid-table finishes he achieved promotion back to the Premiership in 2006. The side were relegated the following season, prompting the board not to renew Warnock's contract.