TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Field Marshal Arthur Wellesley, shares his better known title with which Southern Hemisphere capital city?

SOLUTION: arthur wellesley, 1st duke of wellington

PROBLEM: 'Edward Lewis' and 'Vivian Ward' were the principal characters in which popular 1990 film?

SOLUTION: edward lewis

PROBLEM: Who played Sam 'Ace' Rothstein in the 1995 film 'Casino'?

SOLUTION:
casino