Tuskegee Experiments
Its title refers to the Tuskegee syphilis experiment — the notorious medical experiment conducted around Tuskegee , Alabama , lasting from 1932 to 1972 , in which 400 subjects , mainly poor , black sharecroppers , were used in an investigation of the effects of syphilis without their knowledge or consent . 
<triplet> Tuskegee syphilis experiment <subj> syphilis <obj> main subject