Objects in the image:
category: person
category: skateboard
category: person
category: person
category: person
category: boat
category: person
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 he skateboarding?
a: No
q: is he one among the crowd?
a: Yes