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="Beta-casein" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Bahiagrass" missing="" />
      <page ns="0" title="Bamboo" missing="" />
      <page ns="0" title="Bark hive" missing="" />
      <page ns="0" title="Barred Rock" missing="" />
      <page ns="0" title="Believing in God" missing="" />
      <page pageid="152" ns="0" title="Banality of good" />
      <page pageid="47542" ns="0" title="Banana bread" />
      <page pageid="47429" ns="0" title="Beef Industry" />
      <page pageid="107" ns="0" title="Beef industry" />
      <page pageid="47450" ns="0" title="Beekeeping" />
    </pages>
  </query>
</api>