code: def parse_coaches(self):
          
          lx_doc = self.html_doc()
          tr = lx_doc.xpath('//tr[@id="HeadCoaches"]')[0]
  
          for i, td in enumerate(tr):
              txt = td.xpath('.//text()')
              txt = ex_junk(txt, ['\n','\r'])
              team = 'away' if i == 0 else 'home'
              self.coaches[team] = txt[0]
  
          return self if self.coaches else None
docs: Parse the home and away coaches
  
          :returns: ``self`` on success, ``None`` otherwise