@prefix :        <http://example/> .
@prefix rs:      <http://www.w3.org/2001/sw/DataAccess/tests/result-set#> .
@prefix rdf:     <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .

[]    rdf:type      rs:ResultSet ;
      rs:resultVariable  "p" ;
      rs:resultVariable  "s" ;
      rs:resultVariable  "o" .