{"answers": "D", "options": ["f : 30 meters ? that 's very close .", "f : 60 meters to the exit ?", "f : so it 's only 50 meters from here to the exit .", "f : 50 meters ? i think i can walk there ."], "article": "f : excuse me . i need to get to cambridge today . m : would you like to go by train or by bus ? f : i am not sure . which one is better ? m : the bus is cheaper , but also slower . it will take about 2 and half hours . f : and how long does the train take ? m : if you take the fast train , it will take about 50 minutes . f : where do i catch the train ? m : the trains for cambridge leave from kings cross station . they run every half hour . most trains to cambridge go from platform 9 . f : how do i get to kings cross station ? m : the best way is to take an underground train directly to kings cross station . the underground station is just round the corner from here . f : can you show me on the map ? m : just turn right when you leave , and then turn right again at the first crossroads . the entrance to the underground station is about 50 meters further on .", "id": "train_3628"}