You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <alllinks galcontinue="Basic_Task_States|808" />
  </query-continue>
  <query>
    <pages>
      <page pageid="3" ns="0" title="Contribute as Participant" />
      <page pageid="64" ns="0" title="Train Felix on understanding basic task states" />
      <page pageid="97" ns="0" title="Train Hilary on understanding basic task states" />
      <page pageid="203" ns="0" title="Train Xuan on understanding basic task states" />
      <page pageid="238" ns="0" title="Train Gopal on understanding basic task states" />
      <page pageid="279" ns="0" title="Train Matheus on understanding basic task states" />
      <page pageid="315" ns="0" title="Train Tom Harmon on understanding basic task states" />
      <page pageid="385" ns="0" title="Train Facundo Scordo on understanding basic task states" />
      <page pageid="455" ns="0" title="Train Neda Jahanshad on understanding basic task states" />
      <page pageid="770" ns="0" title="Train Kei Yoshimura on understanding basic task states" />
    </pages>
  </query>
</api>