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

Guessing-game dialogue about one of the objects:
q: is it human?
a: Yes
q: is it on the front boat?
a: No
q: is it on the boat in far back?
a: No
q: is it on or near the train?
a: Yes
q: is it the driver?
a: No
q: is it behind a window?
a: N/A
q: is it standing by train on dock?
a: Yes
q: is it in group of six standing close together?
a: Yes
q: is it in left three of that group?
a: No
q: is it wearing very dark clothes?
a: Yes
q: is it 3rd from right, 4th from left?
a: Yes
q: is it one person only?
a: Yes