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.

Example Input: The drifter pulled out his harmonica while riding the train and played a tune over the _ noise.
Example Output: train

Example 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.
Example Output: shelf

Example Input: Kai placed lemon in front of vase and started painting them on a canvas in oils. We see the _ is drawn smaller because it is placed far from Kai.
Example Output:
vase