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

Guessing-game dialogue about one of the objects:
q: is it the skateboard?
a: No
q: is it a person?
a: Yes
q: are they wearing white?
a: No
q: are they wearing red?
a: No
q: are they wearing green?
a: No
q: Is it the one in the maroon hoodie?
a: No
q: is it the skateboarder?
a: No
q: is it the person behind him?
a: No
q: is it someone at the book shop?
a: Yes