class_docstr: A single QA candidate answer.
code: def to_list(self):
      return [
          self.answer,
          self.offset_answer_start,
          self.offset_answer_end,
          self.score,
          self.passage_id,
      ]
  
imports: from typing import List, Any
  from abc import ABC
  import logging
label_desc: Use image node_id 9 for calling the QACandidate obj's underlying member method code with example usage: obj.to_list() and returns: list