Question: What is the date of death of Sverre Hagerup Bull's father?
Sentence (from "Sverre Hagerup Bull"): His main textual works were the two-volume "Musikk og musikere" ('Music and Musicians', released in 1930 and 1932) and 1951's "Musikkens verden" ('The World of Music'), for which he was the editor.
Relevant evidence: No