Objects in the image:
category: bench
category: car
category: bus
category: bench
category: car
category: car
category: truck

Guessing-game dialogue about one of the objects:
q: is it firetruck?
a: No
q: is it car?
a: No
q: is it person?
a: No
q: is it van/truck?
a: Yes
q: the one behind big red truck?
a: Yes