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

Guessing-game dialogue about one of the objects:
q: is it in front?
a: N/A
q: is it person?
a: Yes
q: is in backmost?
a: No
q: is in front back?
a: No
q: is a person?
a: Yes
q: on the platform?
a: No
q: on the train?
a: Yes
q: on the left side?
a: Yes