code: def pos(self):
          
          if self._pos is None:
              poses = self._element.xpath('POS/text()')
              if len(poses) > 0:
                  self._pos = poses[0]
          return self._pos
docs: Lazy-loads the part of speech tag for this word
  
          :getter: Returns the plain string value of the POS tag for the word
          :type: str