The planet Uranus has 27 moons. Of these 24 are named after characters in William Shakespeare (WS) plays, 2 are named after characters in a poem by Alexander Pope (AP) and 1 is jointly named from works of both authors. Simply match 18 of the moons to the corresponding works and authors. Note in the game the author names are abbreviated.
The game ends when you get all 18 questions correct, or when you give up ;)