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

Who composed 'Belshazzar's Feast' cantata?
belshazzar's feast

Which was the title of the 7th and final book in the Chronicles of Narnia by C.S. Lewis?
the chronicles of narnia

October 27, 1858 saw the birth of what total badass, who spent time as New York City Police Commissioner, Assistant Secretary of the Navy, 33rd Governor of New York, and 25th Vice President of the US, before going on to a few other impressive jobs?

assistant secretary of the navy