Complex sentence: McGregor defeated former featherweight champion José Aldo at UFC 194 in 13 seconds in the fastest UFC title fight victory, and former lightweight champion Eddie Alvarez at UFC 205.
Split into simpler sentences: McGregor defeated former featherweight champion José Aldo at UFC 194 in 13 seconds, which is the fastest UFC title fight victory. He won the UFC lightweight belt against former champion Eddie Alvarez at UFC 205.