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

Guessing-game dialogue about one of the objects:
q: Is it a person?
a: No
q: Is it the bus?
a: No
q: Is it a backpack?
a: N/A
q: Is it something on one of the persons?
a: N/A
q: Is it a white and black bag?
a: No
q: Is it black?
a: No
q: Is it on the left side of the photo?
a: No
q: Is it a green bag with black trim?
a: Yes