Task: Question Answering
Input (English): Passage: Last night , I babysat for my older sister . She went to see a movie with my brother in law , so I went over to watch my niece and nephew . My niece is 1 year old and my nephew is 6 .  It 's not the most fun part of babysitting , but it is important because she would be so uncomfortable if I was n't there to help change her diaper ! After that , she was mostly sleeping the whole time . With my nephew , we played with cars and watched Transformers .  I made spaghetti and meatballs for my nephew and baby food for my niece . The one thing I love the most about watching them is that they are such sweet kids ! Question: When did they change their niece's diaper? Option1: when she wet it Option2: when it was dry
Output (English): when she wet it