Objects in the image:
category: person
category: skateboard
category: person
category: bottle
category: skateboard
category: person
category: bench
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 an item being worn?
a: No
q: is it a skateboard?
a: Yes
q: is it the skateboard being used here?
a: Yes