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

Guessing-game dialogue about one of the objects:
q: Is it a surfing board?
a: No
q: Is it a  person?
a: Yes
q: Is he in front?
a: No
q: Is he first from left?
a: No
q: second from left?
a: No
q: is he with surfing board?
a: No
q: is he at back?
a: Yes
q: third from left?
a: No
q: fourth from left?
a: No
q: fifth from left?
a: Yes