What type of collection does Nådens år and Agnetha Fältskog have in common?
Nådens år: Nådens år (The Year of Grace) is the third studio album by the Swedish rock artist Ulf Lundell. 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.
album