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

Guessing-game dialogue about one of the objects:
q: Is it a train?
a: No
q: Is it ground?
a: No
q: Is it the sky?
a: No
q: Is it the space behind the train?
a: No
q: is it the track?
a: No
q: Is it a part of train?
a: No
q: Is it a person?
a: Yes