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<html lang="en">
    <head>
...
        <p id="para1" class="first-para">This is <em>emphasied</em>. A
+nd this is not.</p>
    </body>
</html>

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use strict;
use warnings;
...
my $em_text = $ra_web_page->[0]{content}[1]{content}[1]{content}[1]{co
+ntent}[0]{value};

print "EM text = $em_text\n";