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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: No
q: is it a bench?
a: No
q: is it a skateboard?
a: No
q: is it the bike?
a: No
q: is it a tree?
a: No
q: is it the thing in the middle of the picture behind the big tree?
a: No
q: is it a backpack?
a: Yes