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

Guessing-game dialogue about one of the objects:
q: Is it a person?
a: No
q: Is it metal?
a: No
q: Is it for helping people change elevation?
a: No
q: Is it black?
a: N/A
q: Is it a skateboard?
a: Yes
q: Is it on the left?
a: Yes