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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: No
q: is it a piece of cloths?
a: No
q: is it one of the ski sticks?
a: No
q: I may not see the full picture, so I will ask about the object position, ok?
a: Yes
q: is it in the bottom of the picture?
a: No
q: on the left side?
a: Yes
q: is it above the level of the knees of the front skier?
a: Yes
q: is it related to the front shier?
a: No
q: is it related to the second skier?
a: No
q: is it related to the back skier?
a: Yes
q: is it the skies of this person?
a: Yes
q: thank you, ok?
a: Yes