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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: No
q: is it a train?
a: No
q: is it on the building?
a: No
q: is it on the tracks?
a: No
q: is it in the background?
a: No
q: is it a bag?
a: Yes
q: is it in the first group of people to our left?
a: Yes
q: is it black?
a: Yes
q: held by the woman in a black dress?
a: Yes