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: FORBES' RICHEST PEOPLE
Clue: Worth $53.5 billion, Carlos Slim, owner of Telmex, became the first person from this country to top the Forbes list
[EX A]: mexico

[EX Q]: Category: HEAVY MACHINERY
Clue: By definition it's a machine that gives a surface an even degree of slope
[EX A]: grader

[EX Q]: Category: FLY ME, BUT NOT TO THE MOON
Clue: Hong Kong's home carrier, in 2006 it celebrated its 60th anniversary
[EX A]:
cathay pacific