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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: Yes
q: the boy in light blue hitting the ball?
a: No
q: the boy in white behind him?
a: No
q: the boy in dark blue, jeans, and boots?
a: Yes