Problem: Which popular song from 1972 told the story of the aftermath of an incident at a concert by Frank Zappa and the Mothers of Invention when someone fired a flare gun?
Answer: smoke on water

Problem: ETA, an armed nationalist and separatist organization, is based in which country?
Answer: spain

Problem: Who played the title character in the 2009 film 'X-Men Origins: Wolverine'?
Answer: hugh jackman

Problem: Titan and Ganymeade are what in our Solar System?
Answer:
moons