Question: Tamberg's Concerto Grosso, Op. 5 was awarded a gold medal at the 6th World Festival of Youth and Students, which was held in what city?
{'answer': 'Moscow, Soviet Union', 'supporting_facts': [['Concerto Grosso (Tamberg)', 0], ['Concerto Grosso (Tamberg)', 1], ['6th World Festival of Youth and Students', 0]]}