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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: No
q: is it attached to a person?
a: Yes
q: is it skis?
a: No
q: is it a backpack?
a: Yes
q: Is it the person in front with red boots?
a: No
q: is it the red backpack in the middle?
a: Yes