docstr: Training triplets (h, r, t)
  - np.ndarray of shape (num_triplets, 3)
  - i-th row corresponds to the i-th triplet (h, r, t)
docstr_tok: ["Training","triplets","(","h",",","r",",","t",")","-","np.ndarray","of","shape","(","num_triplets",",","3",")","-","i-th","row","corresponds","to","the","i-th","triplet","(","h",",","r",",","t",")"]
code: def train_hrt(self) -> np.ndarray:
      """
      Training triplets (h, r, t)
      - np.ndarray of shape (num_triplets, 3)
      - i-th row corresponds to the i-th triplet (h, r, t)
      """
      return self._train_hrt
  
imports: from typing import Optional, Union, Dict
  import os
  import shutil
  import os.path
  import torch
  import numpy
  import pandas
  from ogb.utils.url import decide_download, download_url, extract_zip, makedirs
label_desc: Use image node_id 10 for calling the WikiKG90MDataset obj's underlying member method code with example usage: obj.train_hrt() and returns: self