<prompt> Kuzalisha toleo la ngumu zaidi ya sentensi hii Vaughan alishindana 77 amateur boxing mechi katika Schoolboy, Junior na Senior ngazi.  <response>: Bila shaka, toleo ngumu zaidi ya hukumu ni Vaughan alishindana 77 amateur boxing fights katika Schoolboy, Junior na Senior ngazi, alianzisha Vaughan Promotions mwaka 1990 kukuza kitaalamu mashindano ya ndondi katika Uingereza. 