Who was the first African-American president?
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Barack Obama is African American.
African Americans have an ethnic origin of Barack Obama .
Who was the first African-American president?</s> [unused1]Barack Obama                [unused2] is African American.
Who was the first African-American president?</s>Barack Obama is African American.
Who was the first African-American president?</s>African Americans have an ethnic origin of [unused1]Barack Obama                [unused2] .
Who was the first African-American president?</s>African Americans have an ethnic origin of Barack Obama .
Who was the first African-American president?</s>African Americans,0,African Americans,African Americans,0,[unused1]Barack Obama[unused2],[unused1]Barack Obama[unused2],ethnic or cultural origin,African Americans,[unused1]Barack Obama[unused2],0,[unused1]Barack Obama[unused2]
Who was the first African-American president?</s>African Americans,0,African Americans,African Americans,0,Barack Obama,Barack Obama,ethnic or cultural origin,African Americans,Barack Obama,0,Barack Obama