Original sentence: It is surrounded by the suburbs of Castlecrag, Willoughby and Castle Cove.Middle Cove is a suburb of major historical significance as it was Australia's first fully planed suburb and the first to have under ground water and sewage at the time of the development construction.Middle Cove is located 7 kilometers north of the Sydney central business district, in the local government area of the City of Willoughby.Middle Cove is situated on the western side of Middle Harbour which provides spectacular views.[1] Middle Cove shares its postcode, 2068, with the surrounding suburbs of Willoughby, Castlecrag and North Willoughby
Edited sentence: Middle Cove is located 9 kilometers north of the Sydney central business district, in the local government area of the City of Willoughby.Middle Cove shares its postcode, 2068, with the surrounding suburbs of Willoughby, Castlecrag and North Willoughby