Complex sentence: Perth is named for the capital city of Western Australia whose central business district falls within its borders, and is one of the oldest electorates in Western Australia, with its first member having been elected in the inaugural 1890 elections of the Legislative Assembly.
Split into simpler sentences: Perth is named for the capital city of Western Australia whose central business district falls within its borders. It is one of the oldest electorates in Western Australia, with its first member having been elected in the inaugural 1890 elections of the Legislative Assembly.