Question: When is the composer of song Disillusion (Abba Song) 's birthday?
Sentence (from "Agnetha Fältskog"): She achieved success in Sweden after the release of her debut album "Agnetha Fältskog" in 1968, and reached international stardom as a member of the pop group ABBA, which has sold over 380 million albums and singles worldwide, making them one of the best-selling music artists in history.
Relevant evidence: No