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

Guessing-game dialogue about one of the objects:
q: is it a vehicle?
a: Yes
q: is it an emergency vehicle?
a: No
q: is it on the left side?
a: Yes
q: is it the car in front of the fire truck?
a: Yes