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

Which 1981 film , directed by John Huston, starred footballers Bobby Moore, Pele and Osvaldo Ardiles?
osvaldo ardiles

Eden Park staged some of the 2011 Rugby World Cup matches, in which city can it be found?
eden park

Late actor Larry Hagman played which character in the US television series 'Dallas'?

dallas