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

Guessing-game dialogue about one of the objects:
q: is it front one?
a: No
q: is it person?
a: No
q: is it in left?
a: Yes
q: is it bus?
a: No
q: is it yellow van?
a: No
q: is it bag?
a: Yes
q: is it black one?
a: Yes