code: def _hl_as_string(self, highlight):
          
          # dummy tags to make it valid xml
          dummy_xml = "<p>" + highlight + "</p>"
          try:
              element_tree = ET.fromstring(dummy_xml)
          except ET.ParseError:
              raise ET.ParseError
          return "".join(list(element_tree.itertext()))
docs: Given a solr string of highlighted text, returns the
          str representations
          For example:
          "Foo <em>Muscle</em> bar <em>atrophy</em>, generalized"
          Returns:
          "Foo Muscle bar atrophy, generalized"
          :return: str