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:
a voivodeship, also spelled voivodship, voivodina or vojvodina (romanian: "voievodat", polish: "województwo", serbian: "vojvodina" (војводина), "vojvodstvo" (војводство) or "vojvodovina" (војводовина), hungarian: "vajdaság", lithuanian: "vaivadija", latin "palatinatus" in poland), is a geographical administrative division dating to medieval romania, hungary, poland, lithuania, latvia, russia and serbia (see vojvodina), ruled by a voivod ("voivode", "wojewoda").

Ex Output:
voivodeship


Ex Input:
tabitha st. germain (born august 11, 1976), formerly known as paulina gillis germain, tabitha, or kitanou st. germain, is an american, canadian actress, singer, voice actress, and comedienne.

Ex Output:
tabitha st. germain


Ex Input:
ligny-sur-canche is a commune.

Ex Output:

ligny-sur-canche