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:
walter rudolf hess (17 march 1881 – 12 august 1973) was a swiss physiologist.

Ex Output:
walter rudolf hess


Ex Input:
jan mølby is a former football player.

Ex Output:
jan mølby


Ex Input:
the second temple (hebrew: בית המקדש meaning 'holy house') was the reconstructed temple in jerusalem which stood between 516 bce and 70 ce.

Ex Output:

second temple