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

Guessing-game dialogue about one of the objects:
q: is it the person?
a: Yes
q: the one hitting the ball?
a: No
q: is  it the person on the right?
a: No
q: is it the person to his left where you can see his legs and white feet?
a: Yes