Complex sentence: Steven Leckie also ran art gallery in Toronto called Fleurs Du Mal, notable patrons included The Sex Pistols manager Malcolm McLaren, discovered and mentored various young artists whom later went on to be auctioned at Waddington's and Ritchie's.
Split into simpler sentences: Steven Leckie also ran art gallery in Toronto called Fleurs Du Mal, notable patrons included The Sex Pistols manager Malcolm McLaren. Leckie discovered and mentored various young artists whom later went on to be auctioned at Waddington's and Ritchie's.