Tryit Editor v2.9

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<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="../lib/w3.css">
<body class="w3-container">

<h2>Tiny Tooltip</h2>
<p>Hover over the sentence below!</p>

<p class="w3-tooltip">London
<span style="position:absolute;left:0;bottom:18px"
class="w3-text w3-tag w3-tiny">9 million</span>
is the capital city of England.</p>

</body>
</html>