You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: AMERICAN LITERATURE 
Clue: Thomas Pynchon followed "V" with this novel about the V-2 rocket
gravity\'s rainbow

Category: "GRAND" PRIX 
Clue: This 3-word nickname for the Republicans dates from the 1870s
grand old party

Category: 1947 
Clue: On November 20 they were married in a dazzling ceremony in Westminster Abbey

prince philip & queen elizabeth ii