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.

the nissan maxima is an automobile produced by nissan motor company in seven generations since 1981.
nissan maxima

tactopods are members of a proposed clade of ecdysozoans called tactopoda.
tactopoda

bouligneux is a commune.

bouligneux