Objects in the image:
category: person
category: tennis racket
category: person
category: person
category: sports ball
category: person
category: person
category: person
category: person
category: person
category: person

Guessing-game dialogue about one of the objects:
q: is it a person?
a: Yes
q: is it a person from the crowd?
a: Yes
q: is the person wearing white?
a: No
q: is he wearing blue?
a: No
q: is he wearing black?
a: Yes