???????????? ?????? ??? ??????? ???? ????????? ??????????? ??? ??? ???????? ???? ????????? ? ???? ????????? ?? ??????????? ??? ????????????? ?????.???? ???????????? ??????? ??? ?? ??????????? ??????? ??????? ?? ??? ????????? ??? ?? ??????? ??? ?????????????? ??? ???????????, ?????? ??? ?????????.An example is often a textual content document, which