Instructions: In this task, you will be given a short story. One sentence from the story is chosen. Consider the likely emotions of the participants in the sentence and those affected by it. Is any of these emotions caused by the sentence? You should write your answer in the form " A >Causes> B". Try to use phrases and sentences from the story to compose your answer when possible. For the sentence describing the result, you must use the verb feel(s).
Input: story: When I was seven Years old my dad went on an errand. He claimed he was just going to the store for some groceries. I fell asleep before he got back. The next morning I realized he still wasn't back. My mom and I never really talked about it after that.
 selected sentence: The next morning I realized he still wasn't back.
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
I realize my dad isn't back >Causes> I feel(s) concerned