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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: Yes
q: is it the photographer?
a: No
q: is it the man with the stick?
a: N/A
q: is it the one about to hit the ball?
a: Yes