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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: Yes
q: is the person playing tennis?
a: Yes
q: is it the guy with the short black hair?
a: No