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: GOVERNMENT 
Clue: Under Medicare most Americans this age & over pay a 15% surtax to cover catastrophic illness
answer:
65


question:
Category: FICTIONAL DETECTIVES 
Clue: "The House Without a Key" was the first case solved by this Chinese detective
answer:
charlie chan


question:
Category: PRICELINE 
Clue: In the 1960s this famous structure really was "falling down", so Robert McCulloch paid $2,460,000 & moved it to Arizona
answer:

london bridge