def __init__(self, guid, wordpieces, label, e1, e2):
    """Constructs a RelationInputExample.

    Args:
      guid: Unique id for the example.
      wordpieces: string. The untokenized text of the first sequence. For single
        sequence tasks, only this sequence must be specified.
      label: string. The label of the example. This should be specified for
        train and dev examples, but not for test examples.
      e1: Pair of indices demarking entity 1.
      e2: Pair of indices demarking entity 2.
    """
    self.guid = guid
    self.wordpieces = wordpieces
    self.label = label
    self.e1 = e1
    self.e2 = e2
Constructs a RelationInputExample.

    Args:
      guid: Unique id for the example.
      wordpieces: string. The untokenized text of the first sequence. For single
        sequence tasks, only this sequence must be specified.
      label: string. The label of the example. This should be specified for
        train and dev examples, but not for test examples.
      e1: Pair of indices demarking entity 1.
      e2: Pair of indices demarking entity 2.
    
language/relation_learning/data/fewrel.py