TASK DEFINITION: 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.
PROBLEM: The drifter pulled out his harmonica while riding the train and played a tune over the _ noise.

SOLUTION: train

PROBLEM: Jane couldn't fit the fabric in the washing machine because the _ was too small.

SOLUTION: machine

PROBLEM: Ron followed the online gravy recipe, which called for coffee and water.  The _ seemed to make the gravy thicker.

SOLUTION:
coffee