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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: N/A
q: is it a vehicle?
a: No
q: is it a sign?
a: No
q: is it the big black and red thing over the truck?
a: No
q: is it a tree?
a: No
q: is it on the left half of the picture?
a: Yes
q: is it something a person wears?
a: Yes
q: Is it the yellowish green helmet?
a: No
q: is it a backpack?
a: Yes
q: the backpack on red jacket person?
a: Yes