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

Guessing-game dialogue about one of the objects:
q: is it person?
a: No
q: is it skateboard?
a: No
q: is it plate?
a: No
q: is it bag?
a: Yes
q: the one on the skateboard?
a: Yes