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.

[EX Q]: Category: PRESIDENTIAL FACTS 
Clue: In 1919 this trustbuster's last words were "Please put out the light"
[EX A]: theodore roosevelt

[EX Q]: Category: A WALK ACROSS THE CHARLES BRIDGE 
Clue: Originally called Stone Bridge, the Charles Bridge was built with this "stone", like the walls of the White House
[EX A]: sandstone

[EX Q]: Category: THE MIDDLE AGES 
Clue: The pope hoped Pepin  & his Franks would protect him against these Germanic people (not the Gables) led by Aistulf
[EX A]:
the lombards