fieldset element with legend element

Which version of HTML do you use?

Code

<form>
	<fieldset>
		<legend>Which version of HTML do you use?</legend>
		<input type="radio" name="html" id="html4" value="html4">
		<label for="html4">HTML4</label>
		<br>
		<input type="radio" name="html" id="html5" value="html5">
		<label for="html5">HTML5</label>
	</fieldset>
</form>

Reference