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

Guessing-game dialogue about one of the objects:
q: it a person?
a: No
q: train /?
a: No
q: signboard /?
a: No
q: is it chair?
a: Yes
q: any one sitting on it?
a: Yes