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

Guessing-game dialogue about one of the objects:
q: Is it a person?
a: Yes
q: Is the person on the right wearing black?
a: No
q: Is it the person in front left?
a: No
q: Is the person in the train?
a: Yes
q: Is the person behind the right window?
a: Yes
q: Is the person towards the bottom left of that window?
a: Yes