code: def ter(items):
      """Translation Error Rate is an error metric for machine translation that
      measures the number of edits required to change a system output into one
      of the references
      Source: http://www.cs.umd.edu/~snover/tercom/
      Paper: http://mt-archive.info/AMTA-2006-Snover.pdf
  
      Lower is better
      """
      refs = list(zip(*items))[0]
      preds = list(zip(*items))[1]
      refs, preds = _sacreformat(refs, preds)
      return sacrebleu.corpus_ter(preds, refs).score
  
imports: import math
  from collections.abc import Iterable
  import numpy
  import sacrebleu
  import sklearn.metrics
  import random
  from collections import defaultdict
label_desc: Use image node_id 19 for calling a global function with example usage: ter(items) and returns: sacrebleu