Represent the given dialogue about an image, which is used for image retrieval: Q:is it commercial train
A:subway train
Q:can you see people in it
A:no
Q:is train in speed
A:it appears to be moving
Q:what color
A:silver
Q:is it clean or look dirty
A:it is clean
Q:what time of day
A:unsure, but daylight
Q:is there any other structure
A:yes, citi field in nyc is in background
Q:can you see, where it is heading
A:no
Q:is there any other train
A:no
Q:is anything written on train
A:only #7


['images/VisDial/Train/VisDial_image_119517.jpg', 'images/VisDial/Train/VisDial_image_90724.jpg', 'images/VisDial/Train/VisDial_image_96433.jpg', 'images/VisDial/Train/VisDial_image_95688.jpg', 'images/VisDial/Train/VisDial_image_92461.jpg', 'images/VisDial/Train/VisDial_image_21811.jpg', 'images/VisDial/Train/VisDial_image_121073.jpg', 'images/VisDial/Train/VisDial_image_117182.jpg', 'images/VisDial/Train/VisDial_image_26122.jpg', 'images/VisDial/Train/VisDial_image_4501.jpg', 'images/VisDial/Train/VisDial_image_104355.jpg', 'images/VisDial/Train/VisDial_image_66100.jpg']