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<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8>
<title><h3></title>
</head>
<body>
<!-- is not strictly inline -->
<p><dfn>text
<h3>more text</h3>
</dfn></p>
<!-- is not structured inline -->
<p>text
<h3>more text</h3>
</p>
<!-- cannot contain blocks -->
<h3>
<p>p1</p>
<p>p2</p>
</h3>
<!-- cannot contain structured inline -->
<h3>text
<ul><li>text</li></ul>
</h3>
</body>
</html>