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

Guessing-game dialogue about one of the objects:
q: the whole train?
a: No
q: a person?
a: Yes
q: in first 2 sections of train?
a: Yes
q: driver ??
a: Yes