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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: No
q: a skateboard?
a: Yes
q: in the air?
a: No
q: the one with a person sitting?
a: Yes