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

Guessing-game dialogue about one of the objects:
q: is it a person?
a: Yes
q: is it the one next to the bike, wearing orange vest?
a: No
q: man in shorts and maroon top?
a: Yes