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: fukuoka airport (福岡空港, fukuoka kūkō) , formerly known as itazuke air base, is a japanese airport in fukuoka.
Example Output: fukuoka airport

Example Input: pakistan super league (psl) is a professional twenty20 cricket tournament in pakistan.
Example Output: pakistan super league

Example Input: ernest gary gygax (july 27, 1938 – march 4, 2008) (ipa: ˈgaj.gæks) was an american writer and game designer.
Example Output:
gary gygax