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

Guessing-game dialogue about one of the objects:
q: is it a bike?
a: No
q: is it a person?
a: No
q: is it a vehicle?
a: No
q: is it a backpack?
a: Yes
q: the black one on the bike to the left?
a: Yes