Objects in the image:
category: skateboard
category: person
category: backpack
category: skateboard
category: person
category: person
category: person
category: person
category: bicycle
category: backpack
category: skateboard
category: bench
category: person
category: person
category: person
category: skateboard
category: skateboard
category: person

Guessing-game dialogue about one of the objects:
q: person ??
a: No
q: skate ??
a: Yes
q: standing up?
a: Yes