<?xml version="1.0"?>
<sparql xmlns="http://www.w3.org/2005/sparql-results#">
  <head>
    <variable name="val"/>
  </head>
  <results>
    <result>
      <binding name="val">
          <literal>ac</literal>
      </binding>
    </result>
    <result>
      <binding name="val">
          <literal>abc</literal>
      </binding>
    </result>
    <result>
      <binding name="val">
          <literal>abbc</literal>
      </binding>
    </result>
    <result>
      <binding name="val">
        <literal>abbbc</literal>
      </binding>
    </result>
  </results>
</sparql>
