docs: def extract_cosponsors(bill):
      """
      Return a list of list relating cosponsors to legislation.
      """
      logger.debug("Extracting Cosponsors")
      cosponsor_map = []
      cosponsors = bill.get('cosponsors', [])
      bill_id = bill.get('bill_id', None)
  
      for co in cosponsors:
          co_list = []
          co_list.append(co.get('thomas_id'))
          co_list.append(bill_id)
          co_list.append(co.get('district'))
          co_list.append(co.get('state'))
          cosponsor_map.append(co_list)
  
      logger.debug("End Extractioning Cosponsors")
  
      return cosponsor_map