Objects in the image:
category: traffic light
category: stop sign
category: stop sign
category: traffic light
category: traffic light
category: traffic light

Guessing-game dialogue about one of the objects:
q: is the object a sign?
a: No
q: is the object white?
a: No
q: is the object green?
a: No
q: is the object black?
a: Yes
q: is the object on the left?
a: No
q: is the object in the background?
a: No