Objects in the image:
category: person
category: backpack
category: person
category: person
category: person
category: person
category: train
category: backpack
category: person
category: person
category: person
category: clock
category: person

Guessing-game dialogue about one of the objects:
q: is it a person?
a: Yes
q: is the person wearing red?
a: No
q: does the person have a backpack on their back?
a: Yes