Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.
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Question: maicon douglas sisenando (born 26 july 1981) is a brazilian football player.

Answer: maicon douglas sisenando

Question: violence is when someone attacks someone else, often to get them to do something they do not want to do by making them feel pain or fear.

Answer: violence

Question: ufc 152: jones vs. belfort was a mixed martial arts pay-per-view event held by the ultimate fighting championship on september 22, 2012 at the air canada centre in toronto, ontario, canada.

Answer:
ufc 152