You need to answer a given question containing a blank (_). Your answer must be one of the two objects mentioned in the question, for example "trophy" and "suitcase". Your answer must not contain a word that is not present in the question. Please don't use articles (e.g., the, a) before the answer.

Ex Input:
John do not want to leave the park and go home with his mother because the _ is interesting.

Ex Output:
park


Ex Input:
A boy in a house tries to put a big book on a shelf built for paperbacks. The book falls to the ground because the _ is too narrow.

Ex Output:
shelf


Ex Input:
A child used a mallet and a hammer to drive a nail into a piece of wood.  He got excited when he used the _ to pound the nail.

Ex Output:

hammer