here is source that can be annotated http://www.twomargins.com/documents/15 http://www.twomargins.com/documents/15 as referenced here https://news.ycombinator.c

here is source that can be annotated http://www.twomargins.com/documents/15 http://www.twomargins.com/documents/15 as referenced here https://news.ycombinator.com/item?id=7707505 https://news.ycombinator.com/item?id=7707505