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>
    <links plcontinue="647|0|Classroom_learning" />
  </query-continue>
  <query>
    <pages>
      <page pageid="647" ns="0" title="Main Page">
        <links>
          <pl ns="0" title="10th grade" />
          <pl ns="0" title="11th grade" />
          <pl ns="0" title="12th grade" />
          <pl ns="0" title="9th grade" />
          <pl ns="0" title="Academy of Health Sciences program coordinator" />
          <pl ns="0" title="Algebra I" />
          <pl ns="0" title="Algebra II" />
          <pl ns="0" title="Ballot language" />
          <pl ns="0" title="Banning Lewis Ranch Academy" />
          <pl ns="0" title="Bringing Out the Best" />
        </links>
      </page>
    </pages>
  </query>
</api>