{"answers": "B", "options": ["m : you forgot to invite helen to the party !", "m : it 's a pity that helen had to attend the piano class .", "m : i knew that helen forgot the party time , so she did n't show up .", "m : fine . so helen chose to take the piano lesson and refused to come to the party ."], "article": "m : the party has begun . helen has n't come here yet , did you forget to invite her ? f : i did invite her yesterday . she planned to come , but she changed her mind this morning . she had to attend a piano class .", "id": "train_4572"}