In this task, you're given a context passage, followed by a question that needs to be answered. Based on the paragraph, you must write unambiguous answers to the questions and your answer must refer to a specific phrase from the paragraph. If multiple answers seem to exist, write the answer that is the most plausible.
One example is below.
Q: Tracy slept awkwardly on their new bed and was having some pain, so Tracy cracked her neck. 
Question: What did Tracy do with her neck?
A: crack her neck
Rationale: The output phrase perfectly answers the question and is explicitly mentioned in the passage as well.
Q: I had a break between my classes and was feeling a little hungry. I walked to the library and went into the basement where the vending machines were. I did not want a whole meal, so a vending machine snack seemed like a good choice. After looking through my options I decided that some animal crackers would do the trick and help me feel full and alert before my next class. I put my seventy five cents into the coin slot and punch in A-4, which was the number under the animal crackers that I wanted. As soon as I did the stop on the animal crackers dropped just long enough for one pack of animal crackers to fall down. I reached down and pushed back the lid on the retrieval drawer. Off I went, happy to have found a vending machine and buy the animal crackers that I desired. 
Question: What did they buy from the machine?
A:
They bought some animal crackers.