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.

chiayi city (; taiwanese: ka-gī chhī) is a provincial city of southwestern taiwan province of the republic of china.
chiayi city

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.
violence

copenhagen is the capital city of denmark.

copenhagen