Conversation so far:
What happened during Billie Holiday's life in 1929?
By early 1929, Billie Holiday had joined her mother in Harlem. Their landlady was a sharply-dressed woman named Florence Williams, who ran a brothel at 151 West 140th Street.
What else did Billie Holiday and her mother do in Harlem?
Billie Holiday's mother became a prostitute, and within a matter of days of arriving in New York, Holiday, not yet 14, became a victim of sexual trafficking at $5 a client.

Question: What music did she produce?
Self-contained rewrite: What music did Billie Holiday produce?