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: eugenio bersellini (10 june 1936 – 17 september 2017) was an italian football player and manager.
Example Output: eugenio bersellini

Example Input: "hail to the chief" is the official presidential anthem of the united states.
Example Output: hail to the chief

Example Input: katsuhiro kusaki (草木 克洋, kusaki katsuhiro, born april 12, 1962) is a former japanese football player.
Example Output:
katsuhiro kusaki