Teacher:In this task, you are given a context paragraph, a question based on that and corresponding answer of a question. Your task is to generate supporting fact/knowledge from context paragraph which helps in answering a given question.
Teacher: Now, understand the problem? Solve this instance: Australian Railroad Group (ARG) was an Australian rail freight operator. It began operations in Western Australia on 17 December 2000 following its purchase of the Westrail freight business. It was purchased by QR National in June 2006. The main commodities hauled by ARG included grain, mineral sands, alumina, bauxite, coal, woodchips, quartz, nickel and iron ore around Western Australia. In June 2011 it ceased trading as a separate brand, and became part of QR National. Question: When did the Australian rail freight operator, whose main commodities included Aluminium oxide, become part of QR National? Answer: June 2011
Student:
Australian Railroad Group ARG was an Australian rail freight operator.