Objects in the image:
category: traffic light
category: car
category: car
category: traffic light
category: traffic light
category: bus
category: fire hydrant
category: car
category: bus
category: car
category: car
category: bus
category: backpack
category: person
category: car
category: person
category: traffic light

Guessing-game dialogue about one of the objects:
q: is it a person?
a: No
q: is it a vehicle?
a: No
q: is it a tree?
a: No
q: is it a building?
a: No
q: is it a sign?
a: No
q: is it a traffic light?
a: No
q: is it a post?
a: No
q: is it on the left half of the picture?
a: Yes
q: is it yellow?
a: No
q: is it green?
a: No