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

Guessing-game dialogue about one of the objects:
q: is it a human?
a: No
q: is it a surf board?
a: Yes
q: is the surf board with the persons wearing t shirts?
a: No
q: is the surf board with the person who is alone?
a: No
q: is the surfboard with the person before the red t shirt?
a: Yes