Question: Friðrik Karlsson is an Icelandic musician and songwriter who contributed to the soundtrack of musical with a book by Nan Knighton and music and lyrics by who?
Sentence (from "Saturday Night Fever (musical)"): Saturday Night Fever is a musical with a book by Nan Knighton (in collaboration with Arlene Phillips, Paul Nicholas, and Robert Stigwood) and music and lyrics by the Bee Gees.
Relevant evidence: Yes