Manual linebreak and formatting docbook

I am trying to make a simple help with DOCBOOK. I need to format the text rather than letting text to be compact and non readable.

So far I tried <?line-break?>, <?lb?> and <sbr/>. I only tried adding them to the position where I expect the line break as if using "\n" on C based language.

I am clueless of getting this done and I could not find any helpful resources. Any help appreciated regarding manual line break or formatting the text

<article xmlns='http://ift.tt/15UgvhS'>
    <title>Welcome to help</title>
    <section>
        <simplesect>
            <title>Abstract</title>
            <para>
              <!--Multi-lined paragraph where I 
                  need to break the lines manually
               -->
            </para>
        </simplesect>
    </section>
</article>