Represent the given dialogue about an image, which is used for image retrieval: Q:how many signs are on rail
A:3
Q:is yellow only color of rail
A:yes
Q:are 3 signs all same color
A:no
Q:what color is biggest sign
A:yellow
Q:what kind of sign is yellow sign
A:"all cars pull up here"
Q:what color is smallest sign
A:black
Q:what kind of sign is black sign
A:no loitering
Q:what color is other sign
A:yellow
Q:what kind of sign is it
A:they are all traffic signs
Q:is there anything else in picture
A:cars


['images/VisDial/Train/VisDial_image_92496.jpg', 'images/VisDial/Train/VisDial_image_91327.jpg', 'images/VisDial/Train/VisDial_image_105267.jpg', 'images/VisDial/Train/VisDial_image_73784.jpg', 'images/VisDial/Train/VisDial_image_20132.jpg', 'images/VisDial/Train/VisDial_image_98464.jpg', 'images/VisDial/Train/VisDial_image_92734.jpg', 'images/VisDial/Train/VisDial_image_47701.jpg', 'images/VisDial/Train/VisDial_image_90463.jpg', 'images/VisDial/Train/VisDial_image_108761.jpg', 'images/VisDial/Train/VisDial_image_12024.jpg', 'images/VisDial/Train/VisDial_image_26364.jpg']