Objects in the image:
category: person
category: skateboard
category: fire hydrant
category: car
category: person
category: person
category: person
category: car
category: skateboard
category: skateboard
category: person
category: car
category: person
category: skateboard
category: car
category: skateboard
category: car
category: skateboard
category: car

Guessing-game dialogue about one of the objects:
q: it is someone?
a: No
q: a skateboard?
a: No
q: a car?
a: Yes
q: a white one?
a: No
q: one of the two grey on left?
a: No
q: the white van?
a: No
q: the behind the two grey in front?
a: No