How to create a text child without tag using GDataXml

How to create the following Html using GDataXml:

<p> First string child <a>link</a> second string child</p>

Note that <p> has three child:

1. 
   

   Text without any tag: "First string child"

   
   


2. 
   

   Link: <a>link</a>

   
   


3. 
   

   Text without any tag: second string child.