Conversation so far:
what happened in 1976 to ABBA?
In March 1976, the band released the compilation album Greatest Hits.
what was the ABBA's 1976 album called?
In March 1976, the band released the compilation album Greatest Hits.
was ABBA's Greatest Hits album successful?
It became their 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 any other music besides their Greatest Hits album?