Problem: Which Persian emperor was defeated by the Greeks at the naval Battle of Salamis in 480 B.C.?
======
A: xerxes

Problem: Which Frenchman was Formula One World Champion three times in the 1980's?
======
A: alain prost

Problem: In the game of snooker, which colour ball should be pocketed after all the reds?
======
A: yellow

Problem: What branch of the British military wear red caps?
======
A:
military police