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

Guessing-game dialogue about one of the objects:
q: is it vehicle?
a: No
q: is it traffic light?
a: Yes
q: the front big light?
a: No
q: in the right bottom?
a: Yes