instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Who achieved fame for his ,'Confessions Of An English Opium Eater'?
answer:
confessions of an english opium-eater


question:
Who was Prime Minister of Australia at the outbreak of World War I?
answer:
australia


question:
Who wrote The Sheep Pig, that was made into the film Babe?
answer:

babe