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

Guessing-game dialogue about one of the objects:
q: is it a boat?
a: No
q: is it a person?
a: Yes
q: is one of them on the white/black boat?
a: No