Objects in the image:
category: snowboard
category: skis
category: person
category: person

Guessing-game dialogue about one of the objects:
q: is it a person?
a: No
q: is he wearing green?
a: No
q: is it a sign?
a: No
q: is it something on the persons?
a: Yes
q: is it on the right person?
a: Yes
q: is it on his head?
a: No
q: is it skis?
a: Yes
q: is is left ski?
a: N/A
q: is both skis?
a: Yes