Simplify the following text for a Grade 7 native English-speaking person.
Original: An organ trio , in a jazz context , is a group of three jazz musicians , typically consisting of a Hammond organ player , a drummer , and either a jazz guitarist or a saxophone player .
Simplified: An organ trio is a type of jazz band with three musicians . Usually a jazz organ trio consists of a Hammond organ player , a drummer , and either a jazz guitarist or a saxophone player .