Objects in the image:
category: person
category: backpack
category: bus
category: person
category: person
category: cell phone
category: backpack
category: bus
category: person
category: person
category: person

Guessing-game dialogue about one of the objects:
q: is it a vehicle?
a: No
q: a human being?
a: No
q: is it a backpack?
a: Yes
q: is light blue in colour?
a: Yes
q: guy wearing blue shirt is wearing it?
a: Yes