On a sidewalk , tall man in a black shirt and a police officer with their backs to the viewer walk past a man in a white t-shirt , black shorts , and sandals .
It is improbable that a police officer walks with a friend down a sidewalk past a man .
It is probably the case that a police officer walks with a friend down a sidewalk past a man .
It is improbable that a police officer walks with a friend down a sidewalk past a man .
A police officer walks with a friend down a sidewalk past a man .