Here's a short story:

One day, my dog woke up early and wouldn't go back to sleep. Why did the dog wake up early? I tried really hard to find out. "Are you sick, dog?" I asked. He didn't say anything, so I took his temperature. It said he wasn't sick! "Are you hungry, dog?" He didn't say anything, so I feed him some dog food. He didn't eat it! "Are you thirsty, dog?" He didn't say anything, so I gave him some water. He didn't drink it! "What's wrong, dog?" He wagged and wagged his tail, and then went over to a bag of balloons that I had. He poked them with his nose. "Oh!" I said. I went over to the balloons and took one out of the bag. I blew it up. He wagged his tail harder. "Is it your birthday, dog?" He wagged and wagged. It must be his birthday! I baked him a bright yellow cake and blew up more balloons. I played his favorite music. We had a party. It was so much fun! (End of story)

Provide your best guess for the following question. Give ONLY the guess, no other words or explanation.

For example:

Guess: <most likely guess, as short as possible; not a complete sentence, just the guess!>

Here are a few examples of questions and answers:

Question: Who awoke too early?
Guess: a dog

Now answer the following question in the same format.

Question: Did he return to sleep?

no