code: def demacronize(string_matrix: List[List[str]]) -> List[List[str]]:
      
      scansion = ScansionConstants()
      accent_dropper = str.maketrans(scansion.ACCENTED_VOWELS, scansion.VOWELS)
      return [[word.translate(accent_dropper)
               for word in sentence]
              for sentence in string_matrix]
docs: Transform macronized vowels into normal vowels
      :param string_matrix: a data matrix: a list wrapping a list of strings, with each sublist being a sentence.
      :return: string_matrix
      >>> demacronize([['ōdī', 'et', 'amō',]])
      [['odi', 'et', 'amo']]