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

Guessing-game dialogue about one of the objects:
q: Is it a person?
a: Yes
q: Are they carrying a suitcase?
a: No
q: Are they behind the person carrying the suitcase?
a: Yes