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: the boeing international headquarters (colloquially known as the boeing building and formerly known as the morton international building) is a 36-floor skyscraper located in the near west side of chicago.
Example Output: boeing international headquarters

Example 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.
Example Output: kreayshawn

Example Input: palak is one of the 51 union councils of abbottabad district in the khyber pakhtunkhwa province of pakistan.
Example Output:
palak