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.

hedi turki (15 may 1922 – 31 march 2019) was a tunisian artist.
hedi turki

a dipole speaker is a type of a loudspeaker.
dipole speaker

monceau-sur-oise is a commune.

monceau-sur-oise