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

Guessing-game dialogue about one of the objects:
q: Is it a person or something worn by a person?
a: No
q: Is it held by a person?
a: No
q: Is it something a person can lie on?
a: No
q: Is it green?
a: No
q: Is it blue?
a: Yes
q: Is it laying on the bench?
a: Yes