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

Guessing-game dialogue about one of the objects:
q: Is it the sky?
a: No
q: Is it the sand?
a: No
q: Is it the water?
a: No
q: Is it the object that is black in the water?
a: No
q: Is it the splash part of the water?
a: No
q: Is it the orange marker?
a: No
q: Is it a person?
a: No
q: Is it the wave?
a: No
q: Is it the surf board?
a: Yes