@prefix foo:     <http://foo/> .
@prefix rdf:     <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix foaf:    <http://xmlns.com/foaf/0.1/> .
@prefix :        <#> .

<Ex:$1>
      a       <Ex:foo+@If($2='male';'Man';'Woman')> ;
      <Ex:foo+@If($2='male';hasWife;hasHusband)_>
              [ a       <Ex:foo+@If($2='male';'Woman';'Man')> ;
                foaf:name "Ex:$4"
              ] ;
      foaf:mbox "Ex:$3" ;
      foaf:name "Ex:$1" .