Objects in the image:
category: truck
category: truck
category: person
category: person
category: person
category: car
category: person
category: person
category: motorcycle
category: bicycle
category: person

Guessing-game dialogue about one of the objects:
q: is it a vehicle?
a: Yes
q: is it the crawler in front?
a: No
q: is it the truck?
a: No
q: the car behind the truck?
a: Yes