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.

[EX Q]: 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.
[EX A]: violence

[EX Q]: one of the books that cornelia meigs wrote won the newbery medal in 1934.
[EX A]: cornelia meigs

[EX Q]: keratins are a family of fibrous proteins.
[EX A]:
keratin