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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: No
q: is it a bus?
a: No
q: is it a car?
a: Yes
q: is it the gray one behind bus?
a: No