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<!DOCTYPE html>
<html lang="en-US">
<meta charset="utf-8">
<title>CSS Selectors 4 - :lang matching reference</title>
<link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
<style>
div.test { color: green; }
</style>
<div class="test">This should be green</div>