@prefix rdf:    <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rs:     <http://jena.hpl.hp.com/2003/03/result-set#> .

[] rdf:type rs:ResultSet ;
    rs:resultVariable "x" ;
    rs:resultVariable "y" ;
    rs:size "1" ;
    rs:solution
        [ rdf:type rs:ResultSolution ; 
          rs:binding [ rdf:type rs:ResultBinding ;
                       rs:variable "x" ; rs:value _:b1 ] ;
          rs:binding [ rdf:type rs:ResultBinding ;
                       rs:variable "y" ; rs:value _:b1 ] ;
        ] ;
    .