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

Guessing-game dialogue about one of the objects:
q: is it person?
a: Yes
q: is it white helmet?
a: No
q: is it green helmet person?
a: No
q: is it black helmet person?
a: Yes
q: can i select black helmet person?
a: Yes