Question:  Brown Hill Creek is part of the catchment of the river that drains what area of flat, swampy lands?
Sentence (from "Brown Hill Creek"): The Brown Hill Creek, also known as Willawilla in the Kaurna language, part of the Patawalonga River catchment, is a watercourse located in the western suburbs of the Adelaide metropolitan area, in the Australian state of South Australia.
Relevant evidence: Yes