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

Guessing-game dialogue about one of the objects:
q: a player??
a: No
q: Is it a person?
a: No
q: the ball in the air?
a: No
q: Is it a racket?
a: Yes
q: the one used by the guy in front?
a: No
q: behind him??
a: Yes