Complex sentence: It was the first single released from their 4th album "Sandinista!", first released in November 1980 with the anti-nuclear "Stop the World" as its B-side.
Split into simpler sentences: It was the first single released from their 4th album "Sandinista!". The single was released in November 1980, in advance of the release of "Sandinista!", with the anti-nuclear "Stop the World" as its B-side.