Complex sentence: Dee Why is located 18 kilometres north-east of the Sydney central business district and is the administrative centre of the local government area of Warringah Council, and along with Brookvale is considered to be the main centre of the Northern Beaches region.
Split into simpler sentences: Dee Why is a suburb of northern Sydney, in the state of New South Wales, Australia 18 kilometres north-east of the Sydney central business district. It is the administrative centre of the local government area of Warringah Council, and along with Brookvale is considered to be the main centre of the Northern Beaches region.