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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: Yes
q: is he grinding on the rail?
a: No
q: is he on the stairs?
a: Yes
q: black shirt blue jeans?
a: N/A
q: next to him black shirt tan shorts?
a: No
q: blue shirt?
a: No
q: white shirt?
a: No
q: black shirt?
a: Yes
q: next to the blue shirt?
a: No
q: against the wall?
a: No