Given the task definition, example input & output, solve the new input case.
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
Example: Who was the first American President?
Output: president of the united states
The question talks about the president of the USA.

New input case for you: Which American vocalist (described by the British newspaper The Guardian as one of the greatest voices of her generation) whose repertoire included jazz, blues, folk, gospel and pop, was unknown outside Washington, D.C., until after she died of melanoma in 1996?
Output:
blues