Now if you're a historian, you have this extra layer of analysis you can do, where you can say, " Well, let's use this database and see if the slaveholders voted differently from those who were not slaveholders."
如果你是一个历史学家,你可以做这个额外的分层分析,你可以说,“好吧,让我们用这个数据库看看奴隶和非奴隶的投票结果是否不同。”