{"answers": "C", "options": ["m : so , you mean tickets at the door are usually sold at a lower price and the tickets are sold in advance at half price ?", "m : so , you mean we do n't have to get the concert tickets in advance but it 's difficult to buy the tickets on the spot ?", "m : really ? it 's better to buy the tickets beforehand and tickets at the door are usually sold at a higher price ?", "m : ok , i see . it 's better to buy the tickets beforehand and we have to get the baseball tickets in advance ."], "article": "m : do we have to get the concert tickets in advance ? f : certainly , tickets at the door are usually sold at a higher price .", "id": "train_4442"}