def _get_tokens(s):
  """Split the string into tokens.

  Args:
    s: string to be split

  Returns:
    list of tokens
  """

  if not s:
    return []
  return normalize_answer(s).split()
Split the string into tokens.

  Args:
    s: string to be split

  Returns:
    list of tokens
  
language/asqa/scoring.py