code: def get_title(self, context_keys=()):
      return (
          "index",
          "ques",
          "doc",
          "predicted_answer",
          "true_answers",
          "predicted_start_pos",
          "predicted_end_pos",
          "true_start_pos",
          "true_end_pos",
          "start_pos_scores",
          "end_pos_scores",
          "predicted_has_answer",
          "true_has_answer",
          "has_answer_scores",
      )
  
imports: import re
  import string
  from collections import Counter
  from itertools import zip_longest
  from typing import Dict, List
  import numpy
  from pytext.common.constants import Stage
  from pytext.metric_reporters.channel import Channel, ConsoleChannel, FileChannel
  from pytext.metric_reporters.metric_reporter import MetricReporter
  from pytext.metrics import compute_classification_metrics, LabelPrediction
  from pytext.metrics.squad_metrics import SquadMetrics
label_desc: Use image node_id 1 for calling the SquadFileChannel obj's underlying member method code with example usage: obj.get_title(context_keys) and returns: str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str,  str