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Test Info:

<!DOCTYPE html>
<html><head>
<style>
body > span::first-line { }
span::before { content:"before text"; border:3px solid black;}
</style>
</head>
<body>
<span style=" float: left; column-count: 2;">
<span style="float: right;">
<span style=" float: right;column-count: 2;"></span>
</span>
</span>
</body>
</html>