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

Guessing-game dialogue about one of the objects:
q: is it human?
a: Yes
q: tennis player?
a: No
q: Is it the person to the immediate right of the player's right hand?
a: No
q: person in left corner?
a: Yes