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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: No
q: is it a board?
a: Yes
q: is he on it?
a: Yes
q: in the water?
a: Yes