Task: Question Answering
Input (English): Passage: Yesterday I boiled milk for my mom . Whenever she goes to work she asks me to do tasks for her so that when she comes home she does n't have to do it . Yesterday she wanted me to walk across the street to the store and buy some milk . My mom left me instructions how to boil the milk for her . I got a big pan and put it on the oven . I turned on the oven and made the pan hot by turning the dial to high . After a while the milk started to get hot , which I could see because it would move and I saw steam . When bubbles started appearing in the milk , I knew it was boiled and done . Question: When did they walk back home? Option1: before buying milk Option2: after purchase
Output (English): after purchase