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

Guessing-game dialogue about one of the objects:
q: Is it a person?
a: No
q: Is it inside of the vehicle?
a: No
q: Is it a sign?
a: No
q: Is it a door?
a: Yes
q: Is it in the middle of the image?
a: Yes
q: Is it the left part of the door?
a: Yes