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

Guessing-game dialogue about one of the objects:
q: Is it a person?
a: Yes
q: Is it the man in a white shirt, black pants, and a black backpack walking away from the camera on the left side of the picture?
a: Yes
q: Is it all of the man that we can see if the picture?
a: Yes