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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: No
q: is it a skateboard?
a: No
q: is it a tree?
a: No
q: is it touching a skateboarder?
a: No
q: is it the ground?
a: No