i can just about see that
but i don't understand the use of ^ or $
( sex and dougs and rock n roll, Sun 3 Jul 2005, 17:35, archived)

I don't know anything about it,
but it looks like /^ and $/ mark the start and end of the rule used

edit: www.amk.ca/python/howto/regex/regex.html#SECTION000510000000000000000
( glued eel /questions/questionsyoudliketoask/post1648081, Sun 3 Jul 2005, 17:39, archived)