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

Guessing-game dialogue about one of the objects:
q: Is it a man?
a: No
q: Is it luggage?
a: Yes
q: Is it blue?
a: No
q: Is it black?
a: No
q: Is it gray?
a: No
q: But it is on the trolley?
a: Yes
q: And they are all either black, blue or gray?
a: No
q: is it the red tag on the black luggage?
a: No
q: is it the trolley itself?
a: No
q: is it leather?
a: No
q: is it a backpack?
a: Yes
q: the far right one? Farthest from the man?
a: No
q: The one behind it gray front black back?
a: Yes
q: the one sandwiched between a gray and black one, and the farthest right black one right?
a: No
q: the third from the right gray and black one?
a: No
q: the one by the man?
a: Yes