Question: Roy "Pretty Boy" Shaw and Lenny "The Guv'nor" McLean were arch-rivals in what?
Sentence (from "Roy Shaw"): Royston Henry Shaw (11 March 1936 – 14 July 2012), also known as Roy "Pretty Boy" Shaw, Roy "Mean Machine" Shaw and Roy West, was an English millionaire, real estate investor, author and businessman from the East End of London who was formerly a criminal and Category A prisoner.
Relevant evidence: Yes