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

Guessing-game dialogue about one of the objects:
q: a board?
a: No
q: a person?
a: Yes
q: standing ??
a: No
q: left side?
a: Yes
q: on red board?
a: No
q: on blue board?
a: Yes