code: def forward(self, feats, mask):
      path_score, best_path = self._viterbi_decode(feats, mask)
      # return path_score, best_path
      return best_path
  
file_path: DeepKE/src/deepke/event_extraction/standard/bertcrf/crf.py
imports: import torch
  import torch.autograd
  import torch.nn
label_desc: Use image node_id 5 for calling the CRF obj's underlying member method code with example usage: obj.forward(feats, mask) and returns: best_path