question: How does the U.S. census define `` black '' Americans ?
answer: having origins in any of the black ( sub-Saharan ) racial groups of Africa
turker_answer: The U.S. census defined black Americans as having origins in any of the black ( sub-Saharan ) racial groups of Africa .
rule-based: The U.S. census defines `` black '' Americans by having origins in any of the black ( sub-Saharan ) racial groups of Africa .