Objects in the image:
category: person
category: chair
category: person
category: person
category: person
category: person
category: person
category: person
category: person
category: person
category: chair
category: tennis racket
category: person
category: person
category: tennis racket
category: bench
category: person
category: tennis racket
category: person

Guessing-game dialogue about one of the objects:
q: is it person?
a: Yes
q: someone on blue court?
a: Yes
q: in white?
a: Yes
q: with cap?
a: No