.
g/BEGIN/ka
g/END/kb
1,'ad
'b,$d
g/^$/d
g/^##/+s/^/note: /
v/^note/s/^/+ /
%s/+ ##/##/
%s/^## <time>\(.*\)<\/time> - \(.*\)/\
time: \1\
title: \2/
1,$w /dev/stdout
q