Question: Walkley Heights, South Australia is located on land that formerly was a prison originally known as what?
Sentence (from "Walkley Heights, South Australia"): The suburb is located on land formerly comprising the prison farm for Yatala Labour Prison, and includes fifty-five hectares of land formerly owned by R. M. Williams which was compulsorily acquired during the time of former State Premier Sir Thomas Playford.
Relevant evidence: Yes