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

Guessing-game dialogue about one of the objects:
q: Is it a person?
a: No
q: train /?
a: Yes
q: whole train?
a: Yes