code: def load(fname: str) -> 'ParallelDataSet':
          
          data = mx.nd.load(fname)
          n = len(data) // 3
          source = data[:n]
          target = data[n:2 * n]
          label = data[2 * n:]
          assert len(source) == len(target) == len(label)
          return ParallelDataSet(source, target, label)
docs: Loads a dataset from a binary .npy file.