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

Guessing-game dialogue about one of the objects:
q: is it a train?
a: No
q: is it a person?
a: Yes
q: is the person getting onto a train?
a: No
q: is the person wearing black pants?
a: N/A
q: is the person in the middle of the platform?
a: No
q: is the person to the left of the crowd?
a: Yes
q: is the person wearing red?
a: No
q: is the person wearing a white shirt?
a: Yes