Objects in the image:
category: bench
category: sports ball
category: tennis racket
category: person
category: person
category: person
category: bench
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: one of the two players?
a: No
q: a fan?
a: No
q: umpire, in the chair on the left?
a: No
q: person running, on the right, halfway down the image?
a: No
q: a person at the far end of the tennis court?
a: Yes
q: in the far right corner, to the right of the player on the other side of the net?
a: Yes
q: just to the left of the white circle?
a: Yes