title: extract substring from lines using grep, awk,sed or etc
body: <p>I have a files with many lines like:</p>
  
  <pre><code>&lt;a href="http://www.youtube.com/user/airuike" class="yt-uix-sessionlink yt-user-name " data-sessionlink="ei=CKPW6LXqqbQCFSqVIQod_BwsaQ%3D%3D" dir="ltr"&gt;lily weisy&lt;/a&gt;
  </code></pre>
  
  <p>I want to extract www.youtube.com/user/airuike and lily weisy, and then I also want to separate airuike from www.youtube.com/user/  </p>
  
  <p>so I want to get  3 strings: www.youtube.com/user/airuike, airuike and lily weisy</p>
  
  <p>how to achieve this? thanks</p>