Question: Which country is the home of Mount Keith Mine, and the world's largest mining company which operates it?
Sentence (from "BHP"): BHP, the trading entity of BHP Billiton Limited and BHP Billiton plc and formerly known as BHP Billiton, is an Anglo-Australian multinational mining, metals and petroleum dual-listed public company headquartered in Melbourne, Victoria, Australia.
Relevant evidence: Yes