<!DOCTYPE html>
<html>
<body>
<h2>Grouping Form Data with Fieldset</h2>
<p>The fieldset element is used to group related data in a form, and the legend element defines a caption for the fieldset element.</p>
<form action="/action_page.php">
<fieldset>
<legend>Personalia:</legend>
<label for="fname">First name:</label><br>
<input type="text" id="fname" name="fname" value="John"><br>
<label for="lname">Last name:</label><br>
<input type="text" id="lname" name="lname" value="Doe"><br><br>
<input type="submit" value="Submit">
</fieldset>
</form>
</body>
</html>