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?
Sentence (from "Concerto Grosso (Tamberg)"): It was awarded a gold medal at the 6th World Festival of Youth and Students the following year and was subsequently performed through both the Eastern and Western Blocs, launching the Estonian composer's career.
Relevant evidence: Yes