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

Guessing-game dialogue about one of the objects:
q: is it a train?
a: No
q: is it a bridge?
a: No
q: is it a person?
a: Yes
q: on the train?
a: Yes
q: in the left window?
a: No
q: in the middle window?
a: Yes