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

Guessing-game dialogue about one of the objects:
q: is a person?
a: No
q: is the bus?
a: No
q: is a bag?
a: Yes
q: backpack worn by the guy in the background?
a: Yes