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

[]  <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
                rs:ResultSet ;
    rs:resultVariable
                "annot" ;
    rs:solution [ rs:binding  [ rs:value    _:a ;
                                rs:variable "annot"
                              ]
                ] .