404. That’s an error.
The requested URL /bookmarks/mark?op=add&hl=pl&title=&bkmk=http://www.polskieradio.pl/artykul201952_przeboje_tadeusza_wozniaka_w_studiu_piosenki_teatru_polskiego_radia.aspx&annotation=
was not found on this server. That’s all we know.