{"answers": " ", "options": ["m : you mean the price depends on the color . i have to spend $ 130 in the white shirt .", "m : the size makes a difference to the price . the quality of the white shirt is low .", "m : i see . different materials of shirts lead to distinctive prices , so the silk shirt costs more .", "m : oh . the material of the white one is good silk , so the price is higher than the yellow one which is only $ 150 ."], "article": "m : excuse me , can you tell me why the white shirt cost $ 300 while the black one on the left is only half the price ? f : well , that is because the white one is made of good silk .", "id": "test_748"}