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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: Yes
q: is it the person jumping on the surfboard?
a: No
q: is it the person sitting down holding his surfboard?
a: No
q: is it the lady sitting next to him?
a: No
q: is it the guy next to her in the black and green top?
a: No
q: is it one of the people where you only see their legs?
a: Yes
q: is it the first person on the left wearing brown shorts?
a: Yes