Objects in the image:
category: boat
category: bus
category: boat
category: train

Guessing-game dialogue about one of the objects:
q: is it in the water?
a: No
q: is it the bridge?
a: N/A
q: is it a building?
a: No
q: is it a bus?
a: No
q: is it a tree?
a: No
q: is it in the foreground?
a: No
q: is it in the far background?
a: No
q: ok, so its part of the bridge?
a: N/A
q: something on the bridge?
a: Yes
q: is it the train?
a: Yes
q: is it the entire thing?
a: Yes