joining strings question

[patrick.waldo at gmail.com]

Hi all,

I have some data with some categories, titles, subtitles, and a link
to their pdf and I need to join the title and the subtitle for every
file and divide them into their separate groups.

So the data comes in like this:

data = ['RULES', 'title','subtitle','pdf',
'title1','subtitle1','pdf1','NOTICES','title2','subtitle2','pdf','title3','subtitle3','pdf']

What I'd like to see is this:

[RULES', 'title subtitle','pdf', 'title1 subtitle1','pdf1'],
['NOTICES','title2 subtitle2','pdf','title3 subtitle3','pdf'], etc...

I've racked my brain for a while about this and I can't seem to figure
it out.  Any ideas would be much appreciated.

Thanks