Objects in the image:
category: person
category: car
category: backpack
category: suitcase
category: person
category: car
category: car
category: book
category: car
category: car
category: book
category: car
category: suitcase
category: car
category: car

Guessing-game dialogue about one of the objects:
q: Is it a child?
a: No
q: Is it an object?
a: Yes
q: Is it below the children?
a: No
q: Is it a signpost?
a: No
q: Is it a car?
a: Yes
q: Is it the yellow one?
a: No
q: Is it the grey one behind the children?
a: No
q: Is it the black one in the left in front of the children?
a: No
q: Is it the black one on the right in front of the children?
a: Yes