TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Who was the first person to sign the American Declaration of Independence?

SOLUTION: united states declaration of independence

PROBLEM: Which musical has the songs 'Another Suitcase In Another Hall' and 'Oh What A Circus'?

SOLUTION: another suitcase in another hall

PROBLEM: 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?

SOLUTION:
clarinet