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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: N/A
q: is it part of a person?
a: Yes
q: is it an article of clothing?
a: No
q: is it a bag?
a: Yes
q: is it the black backpack?
a: Yes