docs: def lemma(self):
          """
          Lazy-loads the lemma for this word
  
          :getter: Returns the plain string value of the word lemma
          :type: str
  
          """
          if self._lemma is None:
              lemmata = self._element.xpath('lemma/text()')
              if len(lemmata) > 0:
                  self._lemma = lemmata[0]
          return self._lemma