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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: No
q: is it the skateboard thing?
a: No
q: is it a bad?
a: N/A
q: is it a bag?
a: Yes
q: is it the black backpack the person in the red shirt is wearing?
a: Yes