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

Guessing-game dialogue about one of the objects:
q: Is it red?
a: No
q: Is it yellow?
a: No
q: Is it green?
a: No
q: Is it a person?
a: Yes
q: Is the person on the train?
a: No
q: Is the person wearing a vest?
a: Yes
q: Does the vest have white on it?
a: Yes