Complex sentence: In the 1960s, Yorkville flourished as Toronto's bohemian cultural centre, and was considered by some to be the breeding grounds for some of Canada's most noted musical talents, including Joni Mitchell, Neil Young and Gordon Lightfoot.
Split into simpler sentences: In the 1960s, Yorkville flourished as Toronto's bohemian cultural centre. It was the breeding ground for some of Canada's most noted musical talents, including Joni Mitchell, Neil Young and Gordon Lightfoot.