def find_section_title(node)
     title = node.find_first('./db:title')
     if title.nil?
       title = node.find_first './db:info/db:title'
     end
     if title.nil?
       ""
     else
       title.content
     end
   end
def find_section_title(node)
     title = node.find_first('./db:title')
     if title.nil?
       title = node.find_first './db:info/db:title'
     end
     if title.nil?
       ""
     else
       title.content
     end
   end
Find the _title_ of the current section. That element is either
 directly following or inside an _info_ element. Return the empty
 string if no title can be found.