<!-- Implicit -->
<label>First Name
<input type="text" name="first_name" />
</label>
<!-- Explicit -->
<label for="firstName">First Name</label>
<input type="text" id="firstName" name="first_name">
<!--
Note: the 'for' attribute is mapped to the 'id' and NOT name or type
So if id='BobSponge', then for='BobSponge'
-->