<!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">
<p>Hover over the sentence below!</p>
<p class="w3-tooltip">London
<span class="w3-text"><b>9 million</b></span>
is the capital city of England.</p>
</body>
</html>