Objects in the image:
category: person
category: person
category: person
category: skateboard
category: person
category: person
category: person
category: skateboard
category: person
category: skateboard
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 skate board?
a: Yes
q: is it on the ground?
a: Yes
q: in the left end?
a: Yes
q: all wheels are touching the ground?
a: Yes