Objects in the image:
category: tennis racket
category: person
category: person
category: person
category: chair
category: chair
category: chair
category: sports ball
category: person
category: chair
category: person
category: person
category: person
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 roger federer?
a: No
q: is it a fan in the stands watching?
a: No
q: the person with the hat on the far left?
a: No
q: the girl with the blue skirt and white shirt?
a: Yes