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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: No
q: is it something in front of the fence?
a: No
q: is it a car?
a: No
q: is it a bench?
a: No
q: is it green?
a: No
q: is it part of the park?
a: No
q: is it white?
a: Yes