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

Guessing-game dialogue about one of the objects:
q: is it person?
a: No
q: is it ski board?
a: Yes
q: the three persons skiing one among them?
a: No