Objects in the image:
category: person
category: person
category: backpack
category: train
category: person
category: person
category: person
category: tie
category: person
category: handbag
category: person
category: person
category: backpack

Guessing-game dialogue about one of the objects:
q: is it the train?
a: No
q: is it a person?
a: Yes
q: guy in the train?
a: No
q: blue coat?
a: No
q: are they in that same crowd?
a: Yes
q: the guy all the way to the left of that crowd?
a: Yes