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 consistency, answers should be in all lower cased letters.

[Q]: Category: SCIENCE GUYS 
Clue: Eugene Dubois died in 1940 still believing his "Java Man" to be this legendary connector between man & ape
[A]: the missing link


[Q]: Category: FILTHY RICH 
Clue: Worth over $15 billion, Robson, son of Sam, runs this company, the USA's largest private employer
[A]: wal-mart


[Q]: Category: U.S.A. 
Clue: Some of the trees still standing on this Virginia Estate were planted by George Washington himself
[A]:
mount vernon