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

Guessing-game dialogue about one of the objects:
q: is this a person?
a: No
q: is this the train?
a: No
q: is this a sign displayed?
a: No
q: is it the train tracks?
a: No
q: is it the steps?
a: No
q: is it a building?
a: No
q: is it concrete?
a: No
q: is it rocks/gravel?
a: No