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: UNCIVIL UNREST 
Clue: "This is the farewell kiss, you dog", said Muntader al-Zaidi as he threw both of these at Pres. Bush in Dec. 2008
his shoes

Category: QUEEN ELIZABETH II 
Clue: It's Queen Elizabeth's official London residence
buckingham palace

Category: THIS... IS... HEGEMONY! 
Clue: After the Battle of Kosovo in 1389, the Serbs fell under the hegemony of this empire of nomadic Turks

the ottomans