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

Guessing-game dialogue about one of the objects:
q: is it green?
a: No
q: is it a train car?
a: Yes
q: is it blue?
a: No
q: is it grey?
a: Yes
q: is it the front car?
a: Yes
q: is it the one on the right?
a: Yes