character: Sojourner Truth
topic: The role of freed slaves in Northern industry
grade: 11
subject: History
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character: Frederick Douglass
topic: Advocacy for the rights of freed slaves in industrial workforce
grade: 11
subject: History
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character: Harriet Tubman
topic: Contribution of freed slaves to Northern labor and industry
grade: 11
subject: History
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character: W.E.B. Du Bois
topic: Economic impact of freed slaves on Northern industrial growth
grade: 11
subject: History
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