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

Guessing-game dialogue about one of the objects:
q: is it the train?
a: No
q: is it a person?
a: Yes
q: is the person wearing blue?
a: No
q: is the person wearing gray?
a: No
q: is the person between the train cars?
a: Yes