Objects in the image:
category: backpack
category: sports ball
category: person
category: backpack
category: backpack
category: backpack
category: sports ball
category: backpack
category: person
category: sports ball
category: sports ball
category: backpack
category: sports ball
category: person
category: person
category: person
category: person
category: sports ball

Guessing-game dialogue about one of the objects:
q: is it a person?
a: Yes
q: standing ??
a: Yes
q: wearing black?
a: N/A
q: mostly black?
a: No
q: girl in green shorts ?
a: No
q: the leg on the right?
a: No
q: the leg with red show behind number 21?
a: Yes