Objects in the image:
category: car
category: traffic light
category: boat
category: bicycle
category: traffic light
category: person
category: bicycle
category: person
category: boat
category: backpack
category: bicycle
category: traffic light
category: person
category: person
category: traffic light

Guessing-game dialogue about one of the objects:
q: is it person?
a: No
q: is it traffic light?
a: No
q: is it bike?
a: Yes
q: the front blue coat person bike?
a: Yes