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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: No
q: is it one of their equipments?
a: Yes
q: is it in someone's right hand?
a: No
q: in the left hand?
a: N/A
q: is the equipment in the someone's left hand?
a: N/A
q: is it lying on the ground?
a: Yes
q: is it on the bridge?
a: Yes
q: is it the boy's ski?
a: Yes