Task: Question Generation
Input (English): Kim Philby, a Soviet double agent, was a correspondent for the newspaper in Spain during the Spanish Civil War of the late 1930s. Philby was admired for his courage in obtaining high-quality reporting from the front lines of the bloody conflict. He later joined MI6 during World War II, was promoted into senior positions after the war ended, then eventually defected to the Soviet Union in 1963.
Output (English): During World War II, the Soviet double agent who was corresponding for The Times in Spain in the 1930s later joined what agency?