docstr: Add coreference intensity metric for WSC.
docstr_tok: ["Add","coreference","intensity","metric","for","WSC","."]
code: def _add_head_matrix_options(
      self, head_matrix_options: List[str]
  ) -> List[str]:
      """Add coreference intensity metric for WSC."""
      for model_name in self.model_names:
          head_matrix_options += [
              f"{model_name}_coreference_intensity",
              f"{model_name}_accuracy_based_on_head",
          ]
      if self.mode == "compare":
          head_matrix_options += ["coreference_intensity_delta"]
      return head_matrix_options
  
imports: from typing import List, Tuple, Dict, Union
  from abc import ABC, abstractmethod
  import torch
  import pandas
  import numpy
label_desc: Use image node_id 3 for calling the WSCTask obj's underlying member method code with example usage: obj._add_head_matrix_options(head_matrix_options) and returns: head_matrix_options