def add_offset_to_target(example_strings, targets, offset):
  """Adds offset to the targets.

  This function is intented to be passed to tf.data.Dataset.map.

  Args:
    example_strings: 1-D Tensor of dtype str, Example protocol buffers.
    targets: 1-D Tensor of dtype int, targets representing the absolute class
      IDs.
    offset: int, optional, number to add to class IDs to get targets.

  Returns:
    example_strings, labels: Tensors, a batch of examples and labels.
  """
  labels = targets + offset
  return (example_strings, labels)