Objects in the image:
category: person
category: backpack
category: dog
category: person
category: person
category: train
category: person
category: bicycle
category: dog
category: person

Guessing-game dialogue about one of the objects:
q: is it a person?
a: Yes
q: is the person with the bike?
a: N/A
q: is it the person in red visible through the window?
a: Yes