Complex sentence: Kelly was known as a supporter of the government, and an opponent of the radical John Wilkes, and during the second performance of the play at a riot broke out amongst Wilkes' supporters at the Drury Lane Theatre and the play was subsequently withdrawn.
Split into simpler sentences: Kelly was known as a supporter of the government, and an opponent of the radical John Wilkes. During the second performance of the play a riot broke out amongst Wilkes' supporters at the Drury Lane Theatre and the play was subsequently withdrawn.