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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: Yes
q: is the person wearing red top?
a: No
q: is the person behind the persons wearing red top?
a: No
q: is the person wearing black top?
a: Yes
q: is the person's both legs visible?
a: Yes