Website 2.5.0 sections template

[David Pratt <fairwinds1@shaw.ca>]

I am hoping someone can tell me where sections are rendered in Website 
2.5.0

I am wanting to add a choose statement in a customization to add an 
attribute but can't seem to find a template for it.

It renders a section as follows:

         <div class="section" lang="en">
           <div class="titlepage">