Objects in the image:
category: traffic light
category: person
category: person
category: traffic light
category: person
category: person
category: person
category: person
category: backpack
category: person
category: traffic light
category: person

Guessing-game dialogue about one of the objects:
q: Is it one of the colored signs in the background?
a: Yes
q: is it a specific sign?
a: No