Objects in the image:
category: person
category: fire hydrant
category: cup
category: cup
category: person
category: person
category: backpack
category: handbag
category: person
category: person
category: person
category: bicycle
category: cup
category: handbag
category: car
category: cup
category: handbag

Guessing-game dialogue about one of the objects:
q: a person?
a: No
q: water hydrant?
a: No
q: bottle of paint?
a: No
q: backpack/bag ??
a: Yes
q: on the floor?
a: No
q: the green one that the lady with the blue vest has?
a: Yes