I want to know the answer to the following question:
What prolific composer and producer of musicals has been a major force in the West End theater district?
All the background I'm provided with is that "Within the City of Westminster in London the entertainment district of the West End has its focus around Leicester Square, where London and world film premieres are held, and Piccadilly Circus, with its giant electronic advertisements.". Is that enough to answer the question?
Answer: no