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

Guessing-game dialogue about one of the objects:
q: is it person?
a: No
q: is it racquet?
a: No
q: is it tennis ball?
a: Yes
q: i see 4 in center  is it the first one?
a: Yes