Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

Example Input: What nationality was the composer Bela Bartok?
Example Output: bela bartok

Example Input: Which composer's oratorios include 'The Kingdom' and 'The Dream of Gerontius'?
Example Output: the dream of gerontius

Example Input: In which city was Archduke Ferdinand assassinated leading to the World War I?
Example Output:
archduke franz ferdinand of austria