Part II: João Nicolau de Almeida of Ramos Pinto interviews Dirk Niepoort, fifth generation head of his family's Niepoort Vinhos, about terroir expression in Douro Valley table wine and Porto. Niepoort has played a leading role in creating new styles of wine, whether fortified or not, that reflect the ancient vines and steep schist hillsides of one of the world's greatest wine regions.