Objects in the image:
category: person
category: car
category: car
category: bicycle
category: person
category: person
category: person
category: person
category: person
category: person
category: car
category: truck
category: person
category: person
category: person
category: motorcycle
category: person
category: person

Guessing-game dialogue about one of the objects:
q: is a person?
a: Yes
q: wearing black ??
a: Yes
q: on the right of the police truck?
a: No
q: in the crowd at the back?
a: Yes