Objects in the image:
category: traffic light
category: car
category: car
category: truck
category: traffic light
category: traffic light
category: car
category: car
category: truck
category: car
category: car
category: car
category: car
category: traffic light
category: truck
category: traffic light
category: truck
category: car

Guessing-game dialogue about one of the objects:
q: is it traffic signal?
a: Yes
q: is it green?
a: Yes
q: one in the middle?
a: No
q: one on the left?
a: Yes