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<div id="filerDiv">
    <div class="mailer">Mailing Address
...
        <p class="identInfo"><acronym title="Internal Revenue Service 
+Number">IRS No.</acronym>: <strong>000000000</strong><br />Type: <str
+ong>10-Q</strong> | Act: <strong>34</strong> | File No.: <a href="/cg
+i-bin/browse-edgar?filenum=001-33493&amp;action=getcompany"><strong>0
+01-33493</strong></a> | Film No.: <strong>161612131</strong><br /><ac
+ronym title="Standard Industrial Code">SIC</acronym>: <b><a href="/cg
+i-bin/browse-edgar?action=getcompany&amp;SIC=6331&amp;owner=include">
+6331</a></b> Fire, Marine &amp; Casualty Insurance<br />Assistant Dir
+ector 1</p>
    </div>
</div>

    my $root = HTML::TreeBuilder::XPath->new;
...

    my @Baddress = $root->findvalue('//div[@id="filerDiv"]/div[@class=
+"mailer"][2]/span/text()');