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: SWITZERLAND 
Clue: Swiss banks store heaps of gold in vaults below the Bahnhofstrasse, an elegant street in this city
answer:
zurich


question:
Category: ISLAND NATIONS 
Clue: It's where the mambo originated
answer:
cuba


question:
Category: TV THEME LYRICS 
Clue: "Believe it or not, I'm walking on air, never thought I could feel so free"
answer:

greatest american hero