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="Escuela_Rural_El_Cuarenta_-_16823500002217" />
  </query-continue>
  <query>
    <pages>
      <page pageid="64" ns="0" title="Centro Educativo Alto Grande - 26868900080307" />
      <page pageid="99" ns="0" title="Colegio Agropecuario Puente Sogamoso - 26857500021801" />
      <page pageid="94" ns="0" title="Colegio Departamental Integrado Nuestra Señora de Lourdes - 16809200017401" />
      <page pageid="93" ns="0" title="Colegio Integrado Camilo Torres - 16868900151101" />
      <page pageid="30" ns="0" title="Colegio Integrado Nuestra Señora de la Paz- 268092000209" />
      <page pageid="101" ns="0" title="Concentración Escolar María Goretti - 16857500032904" />
      <page pageid="102" ns="0" title="Escuela Industrial 20 de julio - 16857500041801" />
      <page pageid="98" ns="0" title="Escuela Rural Bellavista - 26823500064706" />
      <page pageid="100" ns="0" title="Escuela Rural Bocas del Rosario - 26857500070605" />
      <page pageid="103" ns="0" title="Escuela Rural Cinco Mil - 26868900072202" />
    </pages>
  </query>
</api>