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.

Example Input: elisabeth charlotte of the palatinate, daughter of france by marriage (27 may 1652 - 8 december 1722) was a german princess and the wife of philippe of france, duke of orléans, younger brother of louis xiv.
Example Output: elisabeth charlotte of the palatinate

Example Input: dennis kearney (1847–1907) was an american politician who was himself an immigrant from ireland.
Example Output: dennis kearney

Example Input: a regierungsbezirk is a government region of germany in some federal states ("bundesländer").
Example Output:
regierungsbezirk