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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: Yes
q: is the person sitting?
a: No
q: does the person carry bag?
a: Yes
q: the one in the front.... grey colour bag?
a: Yes