code: def load(self):
      self.download()
      los_adj = pd.read_csv(
          self._resolve_path(self.expected_files[1]), header=None
      )
      adj = np.mat(los_adj)
      los_tf = pd.read_csv(
          self._resolve_path(self.expected_files[0])
      ).transpose()
      return los_tf, adj
  
imports: from .dataset_loader import DatasetLoader
  from ..core.graph import StellarGraph, StellarDiGraph
  import itertools
  import logging
  import os
  import pandas
  import numpy
  from sklearn import preprocessing
  from ..core.experimental import experimental
label_desc: Use image node_id 1 for calling the METR_LA obj's underlying member method code with example usage: obj.load() and returns: los_tf,  adj