1. Go into your archive.
2. Find your 23rd post (or closest to).
3. Find the fifth sentence (or closest to).
4. Post the text of the sentence in your blog along with these instructions.
From March 27, 2005, Great Gray Tragedy:
My friends the Newmans called us the other day to let us know that their son had brought a road-killed great gray over for them to take a look at.The great gray owl incursion: what a time that was.