. . "non_vocal_instrumentalist" . . . . . . "Volker Bertelmann"@en . "Volker Bertelmann (born 1966 in Kreuztal) is a German pianist and composer who mainly performs and records under the name Hauschka. He is best known for his compositions for prepared piano."@en . "Volker Bertelmann"@en . "German musician" . . . . . . . . . "Hauschka"@en . "1966Z"^^ . .