new_contents: def get_url(mf):
      """parses the mf dictionary obtained as returns the URL"""
  
      urls = []
      for item in mf:
          if isinstance(item, basestring):
              urls.append(item)
          else:
              itemtype = [x for x in item.get('type',[]) if x.startswith('h-')]
              if itemtype is not []:
                  urls.extend(item.get('properties',{}).get('url',[]))
  
      return urls
  
subject: add mf_helpers