[Lynne]

You can try something like:

<if condition="$post['fieldX'] == 'student'"> 
    University: $post[fieldy] 
<else />
   <if condition="$post['fieldX'] == 'abiturient'"> 
      School: $post[fieldz] 
   <else />
     <if condition="$post['fieldy']"> 
        University: $post[fieldy] 
     </if>  
   </if> 
</if> 

If that doesn't work, please post *exactly* what you've done with the correct field numbers.