Complex sentence: The City of Cockburn is a Local Government Area in the southern suburbs of the Western Australian capital city of Perth about south of Fremantle and about south of Perth's central business district.
Split into simpler sentences: The City of Cockburn is a Local Government Area with City status, located in the southern suburbs of the Western Australian capital city of Perth. It is situated about south of Fremantle and about south of Perth's central business district.