Conversation so far:
What happened in 1976 with ABBA?
In March 1976, the band ABBA released a compilation album.
What was the ABBA compilation album called?
Greatest Hits.
Was the ABBA compilation album, Greatest Hits successful?
Greatest Hits became ABBA's first UK number-one album, and also took ABBA into the Top 50 on the US album charts for the first time.

Question: Did they produce any other music?
Self-contained rewrite: Did ABBA produce other music after their Greatest Hits album?