In the preceding post the connections between the images are obvious in terms of both the objects (body parts) and their function (giving information). In other cases the connections, however strong, may not be obvious without contextual information. There is no obvious relationship between the pictures below until one knows that the first is of a slave chamber in Zanzibar and the other is the Martin Luther King Memorial in Washington.
Photo: Slave Chamber, Zanzibar, 1999
Photo: Martin Luther King Memorial, Washington, USA, 2011