Task: Question Answering
Input (English): Passage: One morning while drinking my coffee , I glance at the calendar and realize that my brother 's birthday is next week . I have n't gotten him anything yet , and decide I should probably do that today before I forget . I spend some time thinking about what I think he might like to receive as a gift for his birthday . He really enjoys reading science fiction novels , so I decide I 'll go to the Barnes and Nobles and see if I can find a book that he will enjoy . I really love going to the book store so I spend some time browsing the books to see if I can find anything I think might be interesting . There are so many different science fiction novels to chose from . I finally find a novel about space exploration and some people who are searching for a new planet to live on . I pay for the book and take it home and wrap it . Question: When did they go to the book store? Option1: after they drank coffee Option2: One morning while drinking coffee.
Output (English): after they drank coffee