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

Guessing-game dialogue about one of the objects:
q: Is it a person?
a: No
q: Is it a ski?
a: Yes
q: Is one of the three girls in front using it?
a: No
q: Is it the girl in between and behind the girls wearing #12 and #29?
a: No
q: Is it someone sitting?
a: Yes