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

Example Input: Devil's Tower National Monument in Wyoming, USA features prominently in which landmark 1977 science fiction film?
Example Output: devils tower

Example Input: After Harold McMillan who was Britain's next Prime Minister?
Example Output: britain

Example Input: What 2002 novel by Alice Sebold, is the story of a teenage girl who, after being murdered, watches from heaven as her family and friends struggle to move on with their lives while she comes to terms with her own death.?
Example Output:
alice sebold