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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: Yes
q: are they wearing red?
a: No
q: are they holding a surf board?
a: No
q: are they wearing a blue shirt?
a: No
q: are they walking in the water?
a: No
q: do they have some white on their shorts by the wall?
a: No
q: are they next to the wall?
a: Yes
q: are they in  a group of four?
a: Yes
q: going from left to right, is it the second person?
a: No
q: in that group of four, is it the last person?
a: No
q: is it the third one?
a: Yes