TASK DEFINITION: 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.
PROBLEM: Category: ROMAN EMPERORS 
Clue: In 59 A.D. Agrippina wrote to this man, her son, "Tell me why I should plot against your life?"--she was killed anyway

SOLUTION: nero

PROBLEM: Category: PLAYS 
Clue: Based on a myth, this 1913 play became a 1938 movie, a 1956 stage musical & a 1964 movie musical

SOLUTION: pygmalion

PROBLEM: Category: SHAKESPEARE 
Clue: The 3-word title of this play begins & ends with the same 7-letter word

SOLUTION:
measure for measure