code: def _get_start_end(parts, index=7):
      
      start = parts[1]
      end = [x.split("=")[-1] for x in parts[index].split(";") if x.startswith("END=")]
      if end:
          end = end[0]
          return start, end
      return None, None
docs: Retrieve start and end for a VCF record, skips BNDs without END coords