Question: Björn Ulvaeus was a part of a Swedish pop group, formed in Stockholm in 1972, as well as co-producer on the film "Mamma Mia!" with who?
Sentence (from "Mamma Mia! The Movie Soundtrack"): It features performances by the film's cast including Meryl Streep, Amanda Seyfried, Pierce Brosnan, Dominic Cooper, Stellan Skarsgård, Colin Firth, Julie Walters, Christine Baranski, Ashley Lilley, and Rachel McDowall.
Relevant evidence: No