Objects in the image:
category: person
category: person
category: bus
category: person
category: person
category: backpack
category: bus
category: person
category: person
category: person

Guessing-game dialogue about one of the objects:
q: is it a bus?
a: No
q: is it a person?
a: No
q: is it a tree?
a: No
q: is it on the left half of the picture?
a: Yes
q: is it on one of the people?
a: Yes
q: is it the backpack?
a: Yes