Complex sentence: The Spadina Expressway was a proposed freeway to run from north of Highway 401 into the downtown of Toronto via the Cedarvale and Nordheimer Ravines and Spadina Road, it was only partially built before being cancelled in 1971 by the Ontario government due to public opposition.
Split into simpler sentences: The Spadina Expressway was a proposed freeway to run from north of Highway 401 into the downtown of Toronto via the Cedarvale and Nordheimer ravines and Spadina Road. It was only partially built before being cancelled in 1971 by the Ontario government due to public opposition.