Objects in the image:
category: person
category: person
category: person
category: person
category: person
category: person
category: tennis racket
category: person
category: person
category: person
category: tennis racket
category: person
category: sports ball
category: person
category: sports ball
category: person
category: person

Guessing-game dialogue about one of the objects:
q: is it a person?
a: Yes
q: one of the two guys in the middle?
a: No
q: in the front?
a: No
q: in the crowd in the back?
a: Yes
q: is wearing white?
a: No
q: how about blue?
a: No
q: on left side?
a: No
q: on right side?
a: No
q: so not on the left  side or right side?
a: Yes
q: is there another side?
a: Yes
q: is the person in the front of the stand?
a: No
q: then in the back?
a: No