Objects in the image:
category: person
category: person
category: person
category: person
category: person
category: person
category: car
category: bicycle
category: fire hydrant
category: car
category: truck
category: person
category: truck

Guessing-game dialogue about one of the objects:
q: is it a person?
a: No
q: is it a vehicle?
a: Yes
q: car ??
a: No
q: Is it a truck?
a: No
q: bus  ??
a: N/A
q: is it behind the red truck?
a: Yes