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]: ille-et-vilaine is a department found in the west of france in the brittany region.
[EX A]: ille-et-vilaine

[EX Q]: veronika marchenko is a russian activist.
[EX A]: veronika marchenko

[EX Q]: casas de guijarro is a municipality in cuenca, castile-la mancha, spain.
[EX A]:
casas de guijarro