<?xml version="1.0"?>
<sparql xmlns="http://www.w3.org/2005/sparql-results#">
<head>
<variable name="s"/>
<variable name="o"/>
</head>
<results>
<result>
<binding name="s">
<uri>http://example.org/S</uri>
</binding>
<binding name="o">
<uri>http://example.org/O</uri>
</binding>
</result>
</results>
</sparql>