the central role of slavery in the history of the united states 2004-10-1  slavery in africa,  africa's role in the history of transcontinental slave trading has generally been as a provider or  ending slavery in the united states.
{"Image Software": "Google", "Image YCbCrSubSampling": "[2, 2]", "Image ExifOffset": "58", "EXIF ExifVersion": "0220", "EXIF ExifImageWidth": "1600", "EXIF ExifImageLength": "1112"}