Question: Which Chief Justice who was born in 1777 delivered the majority opinion in the case 60 U.S. 393 in 1857 with a 7-2 decision?
{'answer': 'Roger B. Taney', 'supporting_facts': [['Dred Scott v. Sandford', 0], ['Dred Scott v. Sandford', 3], ['Roger B. Taney', 0], ['Roger B. Taney', 1]]}