Simplify the following text for a Grade 7 native English-speaking person.
Original: The Jolson Story and its sequel Jolson Sings Again ( 1949 ) introduced a new generation to Jolson .
Simplified: Larry Parks played Jolson , but Jolson sang the songs himself . A sequel , Jolson Sings Again , was released in 1949 , and was nominated for three Oscars .