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

Guessing-game dialogue about one of the objects:
q: is it the fire hydrant?
a: No
q: is it a person?
a: No
q: is it the umbrella?
a: No
q: is it the car?
a: No
q: is it in the background?
a: No
q: it's not behind the blue wall?
a: No
q: is it the post no bills sign?
a: No
q: is it something on the wall?
a: No
q: is it the street?
a: No
q: is it the sidewalk?
a: Yes
q: the whole sidewalk?
a: No
q: is it the manhole?
a: Yes