code: def convert_disp_quote_elements(self):
          
          for disp_quote in self.main.getroot().findall('.//disp-quote'):
              if disp_quote.getparent().tag == 'p':
                  elevate_element(disp_quote)
              disp_quote.tag = 'div'
              disp_quote.attrib['class'] = 'disp-quote'
docs: Extract or extended quoted passage from another work, usually made
          typographically distinct from surrounding text
  
          <disp-quote> elements have a relatively complex content model, but PLoS
          appears to employ either <p>s or <list>s.