Complex sentence: White announced at the UFC Fan Expo on July 10,2015 that UFC 200 will take place on July 2,2016 at the arena, but was later changed to July 9,2016.
Split into simpler sentences: White announced at the UFC Fan Expo on July 10,2015 that UFC 200 will take place on July 2,2016 at the arena. But the date was later changed to July 9,2016.