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

Guessing-game dialogue about one of the objects:
q: is it the person?
a: No
q: is the person wearing it or holding it or standing on them?
a: Yes
q: is it the skis?
a: No
q: is it the ski poles?
a: No
q: is it his shoes?
a: No
q: is it his pants?
a: No
q: is it his waist pack?
a: Yes