Fix RE grouping to fix <address> microdata parsing issue.

[wilx]

This fixes issue with parsing of microdata in HTML like this:

<address class="byline author vcard" itemprop="author creator" itemtype="http://schema.org/Person">
				By Benjamin Preston			</address>

Notice how the original regex matches the address tag due to missing regex grouping This in turn causes the Person microdata to be empty.