Objects in the image:
category: person
category: suitcase
category: train
category: person
category: cell phone
category: backpack
category: backpack
category: person

Guessing-game dialogue about one of the objects:
q: is it person?
a: No
q: the train?
a: No
q: bag ??
a: Yes
q: the front person's bag?
a: No
q: Is it the white guy with the white shirt going away?
a: Yes