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

Example Input: Who released the albums Sentimental Journey, Goodnight Vienna, Bad Boy, Old Wave and Vertical Man between 1970 and 1999?
Example Output: vertical man

Example Input: Grace Anna Goodhue was the wife of which US President?
Example Output: grace coolidge

Example Input: In which country was England Rugby Union player Dylan Hartley born?
Example Output:
dylan hartley