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

Guessing-game dialogue about one of the objects:
q: is it the train?
a: No
q: is it the station or building behind?
a: No
q: is it the smoke?
a: No
q: is it on the train?
a: Yes
q: is it near the front of the train?
a: No
q: is it the person i the train?
a: Yes
q: the one in the white shirt?
a: Yes