Simplify the following text for a Grade 7 native English-speaking person.
Original: Ellington 's grandson Paul Ellington is a musician and maintains a small salaried band known as the Duke Ellington Legacy , which frequently comprises the core of the big band operated by The Duke Ellington Center for the Arts .
Simplified: Ellington called his music `` American Music '' , not `` jazz '' . Some of the people who played in Ellington 's band were also famous or important jazz musicians .