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

Guessing-game dialogue about one of the objects:
q: Is it a person?
a: No
q: Is it on the left side of the picture?
a: Yes
q: Is it in the front?
a: Yes
q: Is it a sign?
a: No
q: Is it a railing?
a: No
q: Is it a bag?
a: Yes