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="BCL" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="B-29 (航空機)" missing="" />
      <page ns="0" title="B-52 (航空機)" missing="" />
      <page ns="0" title="B-R サーティワン アイスクリーム" missing="" />
      <page ns="0" title="B.B.クィーンズ" missing="" />
      <page ns="0" title="B21スペシャル" missing="" />
      <page ns="0" title="BABEL国際翻訳大賞" missing="" />
      <page ns="0" title="BASIN TECHNO" missing="" />
      <page ns="0" title="BBC" missing="" />
      <page ns="0" title="BBQ CHICKENS" missing="" />
      <page pageid="2106" ns="0" title="B&#039;z" />
    </pages>
  </query>
</api>