Question:  Frank Schuster home became a meeting place for artists, writers and musicians including an English conductor whose first prominent was conductor of what?
Sentence (from "Frank Schuster (music patron)"): His home overlooking St James's Park at 22 Old Queen Street, London, part of which now contains offices of "The Spectator" magazine, became a meeting-place for artists, writers and musicians, including Siegfried Sassoon, John Singer Sargent, Walter Sickert, Sir Edward Elgar and Sir Adrian Boult.
Relevant evidence: Yes