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 Input:
anteaters are mammals of the family myrmecophagidae and the suborder vermilingua.

Ex Output:
anteater


Ex Input:
a private prison is a prison run by a private company instead of the government.

Ex Output:
private prison


Ex Input:
luingne, picard: lœne or lœgne, west flemish: lowiegn, dutch: lowingen, is a village in the belgian province of hainaut.

Ex Output:

luingne