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 person?
a: No
q: is it a bus?
a: Yes
q: the bus in front of us?
a: Yes