Objects in the image:
category: car
category: bus
category: car
category: car
category: person
category: car
category: car
category: car
category: person
category: person
category: person
category: bus
category: person
category: bicycle
category: person
category: person

Guessing-game dialogue about one of the objects:
q: is it a bus?
a: No
q: is it a vehicle?
a: No
q: is it a building?
a: No
q: is it a tree?
a: No
q: is it a person?
a: Yes
q: is the person on the top of the bus?
a: No
q: is the person on the bus?
a: Yes