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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: No
q: is it on or worn by the person?
a: Yes
q: is it on/worn by the person with the green hat?
a: No
q: is it on the person in the back?
a: Yes
q: is it his bag?
a: Yes