Objects in the image:
category: person
category: backpack
category: person
category: person
category: skateboard
category: person
category: person
category: skateboard
category: skateboard
category: bottle
category: person
category: person
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 to the right side?
a: No
q: Is it to the left side?
a: Yes
q: Is it the first one to the extreme left who is sitting?
a: N/A
q: Is it the one who is coming down the steps?
a: No
q: Is it in blue?
a: Yes