Task: Question Answering
Input (English): Passage: Yesterday , I served a drink to my friend . I had a friend come over after school , and since we were playing outside for a long time , he was very thirsty . I asked him if he wanted something to drink and he said yes . Then I asked him what he wanted to drink , and he said he would like to drink some milk . So we went inside to the kitchen , and I got out the gallon of milk and poured us each a glass of milk . He was grateful to me for offering him a glass of milk , but I told him he did n't have to worry about it . I knew it he was thirsty and the only polite thing to do was to offer him something to drink and then serve him that drink . After we drank the milk , we went and had fun outside again . Question: When did they serve the glass of milk to their friend? Option1: on Thursday Option2: after playing outside
Output (English): after playing outside