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

Guessing-game dialogue about one of the objects:
q: it is alive?
a: No
q: is it a sign?
a: No
q: does it have wheels?
a: No
q: is it a light or a camera?
a: No
q: is it a building?
a: No
q: is it a person?
a: No
q: is it made of metal?
a: Yes
q: is it square?
a: No
q: is it some kind of post?
a: No
q: is it a fence?
a: No
q: does the train use it?
a: No
q: is it attached to a building?
a: No
q: is it partially obscured by the train?
a: Yes
q: do people sit on it?
a: Yes