Question: What is the postcode of a town in Cook County, New South Wales, that is situated approximately 100 km west of the Sydney central business district, and about 8 km east of Katoomba?
Sentence (from "Bell, New South Wales"): It is a locality on the junction of the Bells Line of Road, Chifley Road and the Darling Causeway, with an elevation of approximately 1100 m   .
Relevant evidence: No