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<html>
<head>
<style type="text/css">
h1.intro {color:blue;}
p.important {color:green;}
</style>

</head>

<body>
<h1 class="intro">Header 1</h1>
<p>A paragraph.</p>
<p class="important">Note that this is an important paragraph.</p>

</body>
</html>

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