Simplify the following text for a Grade 6 native English-speaking person.
Original: Guys and Dolls is a musical with music and lyrics by Frank Loesser and book by Jo Swerling and Abe Burrows .
Simplified: Guys and Dolls is a musical . The music and lyrics were written by Frank Loesser , and the speaking parts were written by Jo Swerling and Abe Burrows .