Q: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
Which American jazz musician, clarinettist and bandleader, known as King of Swing, Patriarch of the Clarinet, The Professor, and Swing's Senior Statesman, in the mid-1930s led one of the most popular musical groups in America, which was also one of the first racially-integrated musical groups?
A:
clarinet