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.
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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: FRENCH NOVELISTS 
Clue: A relative of Henri Bergson's wife, he used Bergson's mystical concepts of time in his most famous work

Answer: marcel proust


Question: Category: 19th CENTURY NOVELS 
Clue: Its title refers to an imaginary place where things like "honors, preferments... silver, gold, pearls" are sold

Answer:
vanity fair