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: '50s TV 
Clue: In "Have Gun, Will Travel", Richard Boone played this dapper gun-for-hire based in San Francisco's Hotel Carlton
answer:
paladin


question:
Category: TO PROTECT 
Clue: This "service" is best known for protecting the president, but also investigates forgery
answer:
the secret service


question:
Category: U.S. CITIES 
Clue: Paul Revere's house in this capital is the city's only 17th century building downtown
answer:

boston