Complex sentence: His father James Booth, who also used the stage name George Formby, adopted from the town of Formby, Lancashire, and was one of the great music hall comedians of his day, fully the equal of his son's later success.
Split into simpler sentences: His father James Booth used the stage name George Formby, adopted from the town of Formby, Lancashire. He was one of the great music hall comedians of his day, fully the equal of his son's later success.