direct adjacent sibling combinator
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<style type="text/css">
h2 ~ h3 {
text-decoration: underline;
font-size: 22px;
color: lightgreen;
}
</style>
</head>
<body>
<div>
<h2>
Welcome to CSS widgets.
</h2>
<p>
This paragraph of text is indented 20 pixels.
</p>
<h3>
Some underlined text.
</h3>
</div>
</body>
</html>
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