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

Guessing-game dialogue about one of the objects:
q: is it round?
a: No
q: is it the net?
a: No
q: is it a part of the person itself?
a: No
q: is it the grass?
a: No
q: is it one of the white lines?
a: No
q: is it the coat on the person?
a: No
q: is it used to hit tennis balls?
a: Yes
q: is it the tennis racket?
a: Yes