instruction:
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.
question:
Category: LITERATURE 
Clue: Northumbria in the "Age of Bede" or Mercia in Offa's reign are guesses as to where & when this work was created
answer:
beowulf


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


question:
Category: ASTRONOMY 
Clue: In July 2011 it completed its first orbit around the Sun since its discovery in 1846
answer:

neptune