<!DOCTYPE html>
<html>
  <head>
    <title>My Web Page</title>
  </head>
  <body>
    <ol>
  <li>First
    <ul>
      <li>Sub-item 1</li>
      <li>Sub-item 2</li>
    </ul>
  </li>
  <li>Second</li>
  <li>Third</li>
</ol>
  </body>
  </html>
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