Complex sentence: Ottawa West was a federal and provincial electoral district in Ontario, Canada, that was represented in the Canadian House of Commons from 1935 to 1997 and in the Legislative Assembly of Ontario from 1955 to 1999.
Split into simpler sentences: Ottawa West was a federal electoral district that was represented in the Canadian House of Commons from 1935 to 1997. It was also a provincial electoral district represneted in the Legislative Assembly of Ontario from 1955 to 1999.