Original sentence: Critics class much of Manning's humour as [racist], though Manning denies that he himself is a racist.Manning has often courted controversy because he is one of the few English comedians who's act still frequently contains views which were commonly aired in Britain in the seventies but are now seen as socially unacceptable
Edited sentence: Manning has often courted controversy because he is one of the few English comedians who's act still frequently contains views which were commonly aired in Britain in the seventies but are now seen as socially unnaceptable