class_docstr: Mostly borrowed from <https://github.com/clarkkev/deep-coref/blob/master/evaluation.py>
class_docstr_tok: ["Mostly","borrowed","from","<","https",":","\/\/github.com\/clarkkev\/deep-coref\/blob\/master\/evaluation.py",">"]
code: def get_recall(self):
      if self.recall_numerator == 0:
          return 0
      else:
          return self.recall_numerator / float(self.recall_denominator)
  
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 4 for calling the Scorer obj's underlying member method code with example usage: obj.get_recall() and returns: int, unknown