code: def __init__(self):
      self.scorers = [
          Scorer(m) for m in (Scorer.muc, Scorer.b_cubed, Scorer.ceafe)
      ]
  
imports: from __future__ import division
  from __future__ import absolute_import
  from collections import Counter
  from sklearn.utils.linear_assignment_ import linear_assignment
  import numpy
  import torch
  from allennlp.training.metrics.metric import Metric
label_desc: Use image node_id 1 to create a new ConllCorefScores object from inherited base classes: Metric with example: obj = ConllCorefScores()