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.

tabouleh ( "tabūlah"; also tabbouleh or tab(b)ouli) is a salad.
tabouleh

a viola is a musical instrument which is similar to the violin and cello.
viola

ewo is a town of the republic of the congo, located on the west in the cuvette-ouest departement.

ewo