{"answers": " ", "options": ["f : ok. i 'll go by air .", "f : i 'll take the bus to california , since it costs only $ 20 .", "f : bus ticket is much cheaper . i 'd choose to go by bus .", "f : bus ticket is twice the price of train ticket . i should by train ."], "article": "f : can you tell me the least expensive way to get to california ? m : if you go by bus , it 's only $ 30 . but if you go by train , it 's almost twice that much .", "id": "test_531"}