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: MOVIE GEOGRAPHY 
Clue: The Errol Flynn western named for this Kansas town inspired the plot of Mel Brooks' "Blazing Saddles"
dodge city

Category: REALLY BIG 
Clue: Longer than 2 football fields, it was launched at Friedrichshafen, Germany in 1936
the hindenburg

Category: U.S. CITIES 
Clue: The 1985 Live-Aid concert for African relief was held simultaneously in London & this U.S. city

philadelphia