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

Guessing-game dialogue about one of the objects:
q: is it the racquet?
a: No
q: is it the ball?
a: No
q: is it in the background?
a: No
q: is it the tennis payer?
a: Yes