Question: Kaurna is an electoral district of the House of Assembly in the Australian state of South Australia, it is how many km², a semi-urban electorate on Adelaide's far-southern beaches, taking in the suburbs of Aldinga Beach, an outer southern suburb of Adelaide?
Sentence (from "Aldinga Beach, South Australia"): It lies within the City of Onkaparinga and has the postcode 5173.
Relevant evidence: No