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: a dipole speaker is a type of a loudspeaker.

Output: dipole speaker


Input: Consider Input: natassia gail zolot (born september 24, 1989 in san francisco, california), known by her stage name, kreayshawn, is an american rapper, editor and music video director.

Output: kreayshawn


Input: Consider Input: tornio ("") is a town in lapland, finland.


Output: tornio