{"answers": "C", "options": ["f : you are sure that she celebrated her eighteenth birthday last year , so now tina is 19 .", "f : i see . tina is 20 now because you know she celebrated her nineteenth birthday last year .", "f : really ? you are saying that tina is 21 this year ? i ca n't remember . i must have made a mistake .", "f : ok. tina is 21 now , but she did n't celebrate her twentieth birthday last year ."], "article": "f : tina is about 20 now , is n't she ? m : but i 'm sure that she celebrated her twentieth birthday last year .", "id": "train_4575"}