Complex sentence: The Stantec Tower will be located in Edmonton's new downtown arena district and is planned to be a 66 storey mixed used building that will be the tallest building in Edmonton, and the tallest building in Western Canada and outside of Toronto.
Split into simpler sentences: The Stantec Tower will be located in Edmonton's new downtown Ice District, and is planned to be a 66-storey, mixed used skyscraper. It will be the tallest building in Edmonton, and the tallest building in Western Canada and outside of Toronto.