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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: Yes
q: are they on the court?
a: Yes
q: on the right side of picture?
a: N/A
q: on the sidelines but on the court?
a: Yes
q: are they sitting?
a: Yes
q: split picture in middle ,are they to the right?
a: N/A
q: near the middle?
a: Yes
q: are they sitting directly in front of the person in red?
a: No
q: is it the ref under the umbrella?
a: Yes