AIML Condition Issue - conditional-statements

Question

I'm trying to make this code work. It should work, since this was given to me by my teacher, however, it doesn't and I'm not sure why. It seems that, even though I seem to have the condition correct, it won't perform the actions under the condition for the "NO LO SE" value. Thanks in advance!
<?xml version="1.0" encoding="UTF-8"?>
<aiml version="2.0">
<!-- Reglas paises, las modificaremos con LEARN -->
<category>
<pattern>Cual es la capital de <set>pais</set></pattern>
<template>La capital de <star/> es <map name="capital"><star/></map>.</template>
</category>
<category>
<pattern>Cual es la capital de *</pattern>
<template>No lo se</template>
</category>
<!-- Regla 17 de aprendizaje -->
<category>
<pattern>la capital de * es *</pattern>
<template>
<think>
<set var="cap"><srai>CUAL ES LA CAPITAL DE <star/></srai></set>
</think>
<condition var="cap">
<li value="NO LO SE">
<learn>
<category>
<pattern>CUAL ES LA CAPITAL DE <eval><star/></eval></pattern>
<template>
La capital de <eval><star/></eval> es <eval><star index="2"/></eval>
</template>
</category>
</learn>
Recordare que la capital de <star/> es <star index="2"/>
</li>
<li>
Ya lo sabia.
</li>
</condition>
</template>
</category>
<!-- Fin paises -->
</aiml>