premise: Björn Kristian Ulvaeus (] ) (born 25 April 1945; credited as Björn Ulvæus) is a Swedish songwriter, producer, a former member of the Swedish musical group ABBA (1972–1982), and co-composer of the musicals "Chess", "Kristina från Duvemåla", and "Mamma Mia!". He co-produced the film "Mamma Mia!" with fellow ABBA member and close friend Benny Andersson.
hypothesis: Björn Kristian Ulvaeus co-produced the film "Mamma Mia!" with the members of ABBA.
reason: Björn Kristian Ulvaeus co-produced the film "Mamma Mia!" with fellow ABBA member and close friend Benny Andersson but not all members of ABBA just the one member. System does not distinguish all members from one it just maches the words member and ABBA.
  