Objects in the image:
category: tennis racket
category: person
category: person
category: person
category: person
category: backpack
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: Yes
q: is it a player?
a: No
q: is the person sitting on the left side?
a: Yes
q: the front row?
a: No
q: is the person half hidden behind the pole?
a: Yes