code: def get_table_name(self, ind):
          
          if ind >= len(self.ancestry):
              return "", ""
          if ind > -1:
              table_name = self.ancestry[ind]
              ###name = table_name[:-1] + "_name"
              name = table_name[:-1]
              return table_name, name
          return "", ""
docs: Return both the table_name (i.e., 'specimens')
          and the col_name (i.e., 'specimen')
          for a given index in self.ancestry.