source: [word=are] [tag=VBN] [tag=TO] [□]
destination: [word=are] [tag=VBN] [tag=TO] [□=□]
spec: The PaX patches are intended to harden the Linux kernel against various sorts of attacks ; its developers have , at times , been quite harsh in their criticism of security in the mainline kernel . The virus tries to hide its presence by switching off the `` Prompt to save NORMAL.DOT '' option ( in the Options dialogue , opened from Tools menu ) every time a document is closed .