Question:  Ballad for Americans is a studio album of phonograph records by an American singer and actor whose sold how many records, tapes, compact discs and digital downloads?
Sentence (from "Vitaphone"): Vitaphone was a sound film system used for feature films and nearly 1,000 short subjects made by Warner Bros. and its sister studio First National from 1926 to 1931.
Relevant evidence: No