query: what type of music did john lennon sing?
answers: [ ' E x p e r i m e n t a l r o c k ' , ' P o p r o c k ' , ' P o p m u s i c ' , ' B l u e s - r o c k ' , ' A r t r o c k ' , ' S o f t r o c k ' , ' P s y c h e d e l i c r o c k ' , ' R o c k m u s i c ' , ' E x p e r i m e n t a l m u s i c ' ]