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

Guessing-game dialogue about one of the objects:
q: is it something you drive?
a: No
q: is it used to control traffic?
a: Yes
q: is it green?
a: Yes