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

Guessing-game dialogue about one of the objects:
q: is it a train?
a: No
q: is it part of the building?
a: No
q: is it the rails?
a: No
q: is it a person?
a: Yes
q: is the person far at the back with one foot forward?
a: No
q: is he standing in front of the red wall to the right?
a: Yes