Conversation so far:
What did P.G. Wodehouse do in Broadway?
P.G Wodehouse wrote a series of Broadway musical comedies during and after the First World War.
What prompted P.G. Wodehouse to go to Broadway?
P.G. Wodehouse's old songwriting partner Jerome Kern introduced him to the writer Guy Bolton.

Question: How many musicals did he write?
Self-contained rewrite: How many musicals did P.G. Wodehouse write?