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

Guessing-game dialogue about one of the objects:
q: is it front?
a: No
q: is it person?
a: No
q: is it boat?
a: Yes
q: is with the person riding in middle?
a: No
q: is in backmost?
a: Yes
q: is in middle?
a: Yes
q: is single man with it?
a: Yes