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

[Q]: Which actress played Arwen in the trilogy of films?
[A]: arwen


[Q]: Olympic gold medallists Vilhelm Carlberg, Gunde Svan, Agneta Andersson, Sixten Jernberg, Tomas Gustafson, Thomas Wassberg, Ingemar Stenmark, Gert Fredriksson, Henri Saint Cyr, Alfred Swahn, Eric Lemming and Oscar Swahn represented which country?
[A]: ingemar stenmark


[Q]: What is the SI Unit of Electrical Capacitance?
[A]:
capacitance