title: The purpose of using "aria-labelledby" on already labeled input elements?
body: <p>Many ARIA demonstration websites use code such as:</p>
  
  <pre><code>&lt;label for="name" id="label-name"&gt;Your Name&lt;/label&gt;
  &lt;input id="name" aria-labelledby="label-name" type="text"&gt;
  </code></pre>
  
  <p><br>
  But what's the purpose of using <code>aria-labelledby</code> attribute in this case? The <code>input</code> element has already been labeled by the <code>label</code> element which is using <code>for</code> attribute, isn't it?</p>