instruction:
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.
question:
Category: QUEEN ELIZABETH II 
Clue: It's Queen Elizabeth's official London residence
answer:
buckingham palace


question:
Category: HISTORIC FACES 
Clue: This man shared a Nobel Prize with his wife Marie
answer:
pierre curie


question:
Category: I KNOW THAT WORD BACKWARDS & FORWARDS 
Clue: Reza Khan, born in Iran in 1878, & his son were these for a combined 54 years
answer:

shahs