Objects in the image:
category: car
category: person
category: traffic light
category: person
category: bus
category: person
category: car
category: car
category: person
category: car
category: person
category: person
category: person
category: car
category: truck
category: car
category: bus
category: person

Guessing-game dialogue about one of the objects:
q: is it a person?
a: Yes
q: is it one of the people wearing the yellow jacket?
a: No
q: is it one of the people holding a sign?
a: No
q: is it the person on the side walk in the background of the photo?
a: Yes