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: ANCIENT GREEKS 
Clue: This actor of the 6th century B.C. is credited with introducing the use of masks on stage
[A]: thespis


[Q]: Category: VERBS 
Clue: Appropriate last name of Captain William of 18th century Virginia, who promoted vigilante justice
[A]: lynch


[Q]: Category: "N"ATIONS OF THE WORLD 
Clue: It became fully independent of South Africa March 21, 1990
[A]:
namibia