Represent the given dialogue about an image, which is used for image retrieval: Q:is the overpass made of concrete
A:not sure
Q:what is the overpass going over
A:train
Q:how many cars on the train
A:4
Q:does the engine have a logo on it
A:no
Q:does the train have a caboose
A:not sure
Q:what color is the engine of the train
A:white
Q:how many sets of tracks do you see
A:3
Q:are there any oil cars on the train
A:not sure
Q:are there any cars visible
A:no
Q:do you see any people
A:no


['images/VisDial/Train/VisDial_image_41685.jpg', 'images/VisDial/Train/VisDial_image_119473.jpg', 'images/VisDial/Train/VisDial_image_60489.jpg', 'images/VisDial/Train/VisDial_image_1530.jpg', 'images/VisDial/Train/VisDial_image_8316.jpg', 'images/VisDial/Train/VisDial_image_70921.jpg', 'images/VisDial/Train/VisDial_image_21851.jpg', 'images/VisDial/Train/VisDial_image_21752.jpg', 'images/VisDial/Train/VisDial_image_85181.jpg', 'images/VisDial/Train/VisDial_image_117855.jpg', 'images/VisDial/Train/VisDial_image_112113.jpg', 'images/VisDial/Train/VisDial_image_9161.jpg']