Forum:From where does the info in Rin Tohsaka's epilogue come from?

So basically the title says it all I really want to know where this epilogue comes from:

EpilogueEdit
Ten years after the end of 5th Holy Grail War (on the Fate and Unlimited Blade Works routes), Lord El-Melloi II arrived in Fuyuki and together with the head of the Tohsaka clan, Tohsaka Rin, set out to completely take apart the Great Grail. The Association was planning on bring back the Greater Grail, so the two sides were completely opposed. After the end of the great turmoil of the same magnitude as the Grail War, the Greater Grail was completely dismantled and The Grail Wars of Fuyuki came to a complete conclusion here.

I did try searching around but I can't find anything, any awnsers would be great.