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: 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: the timber rattlesnake ("crotalus horridus") is a species of venomous pit vipers.

Answer: timber rattlesnake


Question: the french civil aviation university (french: "école nationale de l'aviation civile"), also known as enac, is a french public aeronautical "grande école" created the 28th of august 1949 and located at biscarosse, carcassonne, castelnaudary, château-arnoux-saint-auban, grenoble, melun, montpellier, muret, saint-yan and toulouse, in france.

Answer:
french civil aviation university