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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: Yes
q: on the bus?
a: Yes
q: top ??
a: Yes
q: are they standing?
a: No
q: are they against the railing ?
a: Yes
q: are they in the window?
a: No
q: is the person behind him?
a: Yes
q: right behind him?
a: Yes