Complex sentence: After Simms struggled in the 2nd half he was replaced by Applewhite in the 4th quarter, but Applewhite was not able to get Texas any points, they fell behind in the last 6 minutes and Applewhite fumbled on their last possession.
Split into simpler sentences: After Simms struggled in the 2nd half he was replaced by Applewhite in the 4th quarter, but Applewhite was unable to produce. Texas fell behind in the last 6 minutes and Applewhite fumbled on their last possession.