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A picture of a street dog and the shadow of a person wearing a hat on a wall beside it.
Photo by Nesrin Öztürk. Public Domain.
A blurred picture of a person walking in a street at night.
Art by David Hammons. Courtesy of Harvard University Art Museums. Public domain.
An overhead shot of an empty brick elevator shaft
Paul Sableman, CC BY 2.0, via Flickr
A hand hovering over a pill organizer filled with multicolored pills
Photo by Laurynas Mereckas on Unsplash