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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: No
q: skies ??
a: No
q: is it something in front of those people?
a: N/A
q: car ??
a: No
q: is it black?
a: Yes
q: what looks like big black bag  on something blue?
a: Yes