Objects in the image:
category: backpack
category: person
category: person
category: person
category: tennis racket
category: person
category: person
category: person
category: person
category: person
category: person
category: person
category: person
category: person
category: person

Guessing-game dialogue about one of the objects:
q: is it player?
a: Yes
q: is it wearing cap?
a: Yes
q: is it wearing red?
a: Yes
q: is he/she in ready posture?
a: Yes