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.

Q: Category: ACTORS 
Clue: While pregnant with him, the mother of this actor, gazing at the Uffizi's art, 1st felt him move, hence his 1st name

A: leonardo dicaprio
****
Q: Category: FOOD SCIENCE 
Clue: In 2002 Japanese scientists discovered it contains the enzyme Lachrymatory-Factor Synthase

A: onions
****
Q: Category: MONARCHS 
Clue: In 2001 Bulgaria elected as prime minister its former child monarch, the only person now living to have held this royal title

A:
czar
****