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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: No
q: is it a tree?
a: No
q: is it a ski?
a: Yes
q: is someone carrying it?
a: No
q: is it on a person?
a: No