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

Guessing-game dialogue about one of the objects:
q: is a car?
a: Yes
q: is one of the row that are behind?
a: No
q: is it gray?
a: Yes
q: the one whos driver is visible?
a: Yes