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

Input: Consider Input: 'Arthur Clennam', 'Jeremiah Flintwinch', and 'Edward Sparkler' are all characters in which Dickens' novel?

Output: arthur clennam


Input: Consider Input: Who achieved fame for his ,'Confessions Of An English Opium Eater'?

Output: confessions of an english opium-eater


Input: Consider Input: Who wrote `Pygmalion` and `Caesar and Cleopatra`?


Output: caesar and cleopatra