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

Guessing-game dialogue about one of the objects:
q: is it a train?
a: No
q: is it the hole train?
a: No
q: is it part of the train?
a: No
q: is it part of the bridge?
a: No
q: is it a person?
a: Yes
q: are they in red?
a: No
q: are they in green?
a: No
q: are they in black?
a: No
q: are they in white?
a: Yes
q: are they on the left?
a: Yes
q: are they setting by the water?
a: Yes