Complex sentence: Don Mills is recognized as the first planned and fully integrated post-war community developed by private enterprise in North America and is credited with developing the blueprint for post-war suburban development in Toronto and the building of contemporary residential neighbourhoods.
Split into simpler sentences: Don Mills is recognized as the first planned and fully integrated post-war community developed by private enterprise in North America. It is credited with being the blueprint for post-war suburban development in Toronto and contemporary residential neighbourhoods.