TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Which popular animated characters, first seen in 1996 include many different characters including ones called Ash Ketchum, Tracy Sketchit and Gar Oak?

SOLUTION: tracy

PROBLEM: In 1864, the Dale Dyke Dam burst while being filled, leading to the death of 240 people in which British city?

SOLUTION: dale dike reservoir

PROBLEM: Who wrote the play Oedipus Rex, Antigone and Electra?

SOLUTION:
electra