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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: Yes
q: is it the person on the left?
a: N/A
q: is it the person on the surfboard?
a: N/A
q: is it the person currently riding the wave standing?
a: N/A