instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Christopher Eccleston, Kerry Fox and Ewan McGregor played flatmates in which 1994 film?
answer:
christopher eccleston

question:
Princess Estelle, Duchess of Ostergotland, granddaughter to King Carl XVI Gustaf, became 2nd in line to what nation's throne when born in 2012?
answer:
carl xvi gustaf of sweden

question:
Which country was proclaimed a People's Republic on 1 October 1949, following the defeat of forces led by Chiang Kai-shek?
answer:
chiang kai-shek