instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Which country had a parliament called the Duma?
answer:
state duma

question:
The Brooklyn Bridge crosses which river?
answer:
brooklyn bridge

question:
July 16, 1917 saw the death of what leader, Emperor of Russia, Grand Prince of Finland, and titular King of Poland, and his children Olga, Tatiana, Maria, Anastasia, and Alexei?
answer:
grand duchess tatiana nikolaevna of russia