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

Guessing-game dialogue about one of the objects:
q: is it person?
a: Yes
q: one in blue shirt?
a: No
q: one standing at right?
a: No
q: Is it the one behind the player in the blue shirt?
a: Yes