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: francis george steiner, fba (born april 23, 1929) is a french-born american literary critic, essayist, philosopher, novelist, and educator.
Example Output: george steiner

Example Input: the global hunger index is a measurement to measure the hunger situation in a country.
Example Output: global hunger index

Example Input: tom glavine (born march 25, 1966) is a former baseball player who played pitcher.
Example Output:
tom glavine