Question: what is the nationality of the composer of String Quartet No. 7 ?
Sentence (from "String Quartet No. 6 (Bartók)"): Due to the difficulties of the war, communication between Bartók and Székely was difficult, and the quartet was not premiered until 20 January 1941, when the Kolisch Quartet, to whom the work is dedicated, gave its premiere at the Town Hall in New York City.
Relevant evidence: No