Objects in the image:
category: person
category: person
category: person
category: person
category: traffic light
category: bus
category: person
category: train
category: person
category: bus
category: person
category: person
category: person
category: traffic light
category: person
category: person

Guessing-game dialogue about one of the objects:
q: is it a bus?
a: Yes
q: blue ??
a: No