<?xml version="1.0"?>
<sparql xmlns="http://www.w3.org/2005/sparql-results#">
  <head>
    <variable name="name"/>
    <variable name="lowage"/>
    <variable name="highage"/>
    <variable name="capacity"/>
    <variable name="ratio"/>
  </head>
  <results>
  </results>
</sparql>
