code: def get_extr_license_text(self, extr_lic):
          
          text_tripples = list(self.graph.triples((extr_lic, self.spdx_namespace['extractedText'], None)))
          if not text_tripples:
              self.error = True
              msg = 'Extracted license must have extractedText property'
              self.logger.log(msg)
              return
  
          if len(text_tripples) > 1:
              self.more_than_one_error('extracted license text')
              return
  
          text_tripple = text_tripples[0]
          _s, _p, text = text_tripple
          return text
docs: Return extracted text  from an ExtractedLicense or None.