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: SUPERHEROES 
Clue: For a while the Hulk was gray, but now he's this color
green

Category: BEFORE I WAS ELECTED 
Clue: Senator Lincoln Chafee of this New England state spent 7 years as a blacksmith at racetracks in the U.S. & Canada
rhode island

Category: HAM 
Clue: The address for this ham radio operator's call sign, EA0JC, is Royal Palace, Madrid, Spain

king juan carlos