Represent the given dialogue about an image, which is used for image retrieval: Q:what does the sign say
A:can't tell
Q:what color is the sign
A:white
Q:is the sky clear
A:yes
Q:are there any trees
A:no
Q:is there any grass
A:a little
Q:what color is the grass
A:green
Q:is the train engine just the 1 by itself, or are there additional box cars
A:by itself
Q:does the train engine have any text
A:yes
Q:what does it say on the train engine
A:bnsf
Q:is there anything else on the tracks
A:no


['images/VisDial/Train/VisDial_image_7553.jpg', 'images/VisDial/Train/VisDial_image_37812.jpg', 'images/VisDial/Train/VisDial_image_9910.jpg', 'images/VisDial/Train/VisDial_image_23937.jpg', 'images/VisDial/Train/VisDial_image_27164.jpg', 'images/VisDial/Train/VisDial_image_119888.jpg', 'images/VisDial/Train/VisDial_image_60797.jpg', 'images/VisDial/Train/VisDial_image_42993.jpg', 'images/VisDial/Train/VisDial_image_122985.jpg', 'images/VisDial/Train/VisDial_image_88882.jpg', 'images/VisDial/Train/VisDial_image_49460.jpg', 'images/VisDial/Train/VisDial_image_52906.jpg']