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.

Ex Input:
norio omura (小村 徳男, omura norio, born september 6, 1969) is a former japanese football player.

Ex Output:
norio omura


Ex Input:
the first and only written biography of doug henning, "spellbound: the wonder-filled life of doug henning" was published in 2009 (john harrison, boxoffice books, new york.)

Ex Output:
doug henning


Ex Input:
francis i of france (september 12, 1494 - march 31, 1547) was a king of france and a member of the house of valois.

Ex Output:

francis i of france