Objects in the image:
category: sports ball
category: chair
category: person
category: tennis racket
category: person
category: person
category: person
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: player, man in white?
a: No
q: woman far right, ref? hands on knees?
a: No
q: ball boy? all in dark blue short pants?
a: No
q: is it a person in the stands watching the match?
a: Yes
q: Is it the person with their arms crossed wearing a dark top?
a: Yes