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

Guessing-game dialogue about one of the objects:
q: is a person?
a: No
q: vehicle ??
a: Yes
q: blue one in the front?
a: No
q: yellow ??
a: Yes