Here is the revision of ABBA's biography:
ABBA is a Swedish pop music group formed in 1972, consisting of four members: Agnetha Fältskog, Björn Ulvaeus, Benny Andersson, and Anni-Frid Lyngstad. The group achieved international success with its songs "Waterloo", "Mamma Mia", "Dancing Queen", and "Take a Chance on Me". In 2010, ABBA was inducted into the Rock and Roll Hall of Fame.