Assertion: alpha's member | /r/HasProperty | naacp founder w. e. b. du bois
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Source sentences:
text: Members of this fraternity include many historical civil rights leaders such as Martin Luther King Jr., NAACP founder W. E. B. Du Bois, John Mack (civic leader), Rev. Joseph E. Lowery, Rev. C.T. Vivian, and Dick Gregory.