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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: Yes
q: Are they playing volley ball?
a: Yes
q: on this side of the net?
a: No
q: if the blue striped shorts?
a: Yes