    Sentence 1: The program ,. which  downloads the pornographic  material to, the usurped computer  only briefly,to allow visitors to  view 5 it 5 4s.invisible jto,,the  computer 's owner «    Sentence 2: -The program 4. which  only -briefly,, downloads the  pornographic ..materialto...the  usurped computer , is invisible to  the computer 's owners