code: def stem(self, words, parser, **kwargs):
          
          output = self._run_morfologik(words)
          return parser.parse(output, **kwargs)
docs: Get stems for the words using a given parser
  
          Example:
              from .parsing import ListParser
  
              parser = ListParser()
              stemmer = Morfologik()
              stemmer.stem(['ja tańczę a ona śpi], parser)
  
              [
                   ('ja': ['ja']),
                   ('tańczę': ['tańczyć']),
                   ('a': ['a']),
                   ('ona': ['on']),
                   ('śpi': ['spać'])
              ]