Objects in the image:
category: person
category: train
category: person
category: person
category: person

Guessing-game dialogue about one of the objects:
q: is it a person?
a: Yes
q: we can see only his back?
a: No
q: is it a male?
a: Yes
q: he wears cap?
a: No
q: he wears blue shirt?
a: Yes