sentences:  Polly died on 30 January 1949.It has often been stated that his grandfather was a professional singer, a ship's cook, and that he emigrated to the United States, and that his father, Jack Lennon, became a "refined" British minstrel, who toured the United States with Roberton's Kentucky Minstrels vaudeville troupe in the late 19th century.It is also claimed that Jack's first wife was an American who died during childbirth after they had both moved back to Liverpool.