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

Q: In which city were the 1912 Olympic games held Oslo, Antwerp or Stockholm?

A: 1912 summer olympics
****
Q: Of all the actors who played Doctor Who in the TV series of the same name, who appeared in the most episodes?

A: doctor who
****
Q: ABC and NBC are TV networks in which country ?

A:
abc
****