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]: rupert thorne is a fictional batman character, who is the crime boss of batman.
[EX A]: rupert thorne

[EX Q]: saint-laurent-du-var is a commune.
[EX A]: saint-laurent-du-var

[EX Q]: viola harris (july 5, 1926 – august 23, 2017) was an american actress.
[EX A]:
viola harris