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.

Input: Consider Input: valbirse is a new municipality of the administrative district of jura bernois in the canton of berne in switzerland.

Output: valbirse


Input: Consider Input: the mini estadi (english: mini stadium) is the home stadium of fc barcelona b, the reserve team of fc barcelona.

Output: mini estadi


Input: Consider Input: the boiling point of a substance is the temperature at which the substance boils, or enters a state of rapid evaporation.


Output: boiling point