Objects in the image:
category: person
category: backpack
category: person
category: person
category: person
category: person
category: person
category: backpack
category: bus
category: person
category: bus
category: person
category: person
category: person
category: person
category: person
category: bus
category: bus
category: person

Guessing-game dialogue about one of the objects:
q: is it a person?
a: No
q: is it a bus?
a: No
q: is it attached to a person?
a: Yes
q: is it a bag?
a: Yes
q: is it on this side of the street?
a: Yes
q: is it the red and black backpack?
a: No
q: is it the grey straps on the closest person?
a: Yes