Before revision: These three cities formed the backbone of the burgeoning movement, but there were also other punk scenes in cities such as Brisbane, Melbourne, and Sydney in Australia, Toronto, Vancouver, and Montreal in Canada, and Boston and San Francisco in the United States.
After revision: , Detroit, Cleveland,These three cities formed the backbone of the burgeoning movement, but there were also other punk scenes in cities such as Brisbane, Melbourne, and Sydney in Australia, Toronto, Vancouver, and Montreal in Canada, and Boston and San Francisco in the United States.