code: def loads(s, single=False):
      
      corpus = etree.fromstring(s)
      if single:
          ds = _deserialize_dmrs(next(iter(corpus)))
      else:
          ds = (_deserialize_dmrs(dmrs_elem) for dmrs_elem in corpus)
      return ds
docs: Deserialize DMRX string representations
  
      Args:
          s (str): a DMRX string
          single (bool): if `True`, only return the first Xmrs object
      Returns:
          a generator of Xmrs objects (unless *single* is `True`)