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: LANGUAGES 
Clue: It's Panama's official language
[EX A]: spanish

[EX Q]: Category: THE WINTER PALACE 
Clue: In 1881 the "Czar Liberator", the II czar of this name, asked to be taken to the palace to die after being fatally wounded
[EX A]: alexander ii

[EX Q]: Category: SMILE! 
Clue: The term Gioconda Smile refers to an enigmatic smile like the famous one painted by this man
[EX A]:
da vinci