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

Guessing-game dialogue about one of the objects:
q: is it person?
a: No
q: is it something person wearing?
a: No
q: is the bat?
a: No
q: is the ball?
a: Yes
q: that two balls near net?
a: Yes
q: is it both?
a: No
q: ball which is near to bat?
a: Yes