Question: What neighboring suburb of O'Halloran Hill has a population of more than 12,000 people?
Sentence (from "O'Halloran Hill, South Australia"): O'Halloran Hill is a suburb in the south of Adelaide, South Australia, situated on the hills south of the O'Halloran Hill Escarpment, which rises from the Adelaide Plains and located 18 km from the city centre via the Main South Road.
Relevant evidence: No