QueryRoot
   Projection
      ProjectionElemList
         ProjectionElem "project"
         ProjectionElem "label"
         ProjectionElem "person"
         ProjectionElem "name"
      NJoin
         ExclusiveGroup
            ExclusiveStatement
               Var (name=person)
               Var (name=_const_f5e5585a_uri, value=http://www.w3.org/1999/02/22-rdf-syntax-ns#type, anonymous)
               Var (name=_const_e1df31e0_uri, value=http://xmlns.com/foaf/0.1/Person, anonymous)
               StatementSource (id=endpoint2, type=REMOTE)
            ExclusiveStatement
               Var (name=person)
               Var (name=_const_23b7c3b6_uri, value=http://xmlns.com/foaf/0.1/name, anonymous)
               Var (name=name)
               StatementSource (id=endpoint2, type=REMOTE)
         ExclusiveGroup
            ExclusiveStatement
               Var (name=project)
               Var (name=_const_e5fa3827_uri, value=http://namespace3.org/responsible, anonymous)
               Var (name=person)
               StatementSource (id=endpoint3, type=REMOTE)
            ExclusiveStatement
               Var (name=project)
               Var (name=_const_f5e5585a_uri, value=http://www.w3.org/1999/02/22-rdf-syntax-ns#type, anonymous)
               Var (name=_const_11e414aa_uri, value=http://namespace3.org/Project, anonymous)
               StatementSource (id=endpoint3, type=REMOTE)
            ExclusiveStatement
               Var (name=project)
               Var (name=_const_9285ccfc_uri, value=http://www.w3.org/2000/01/rdf-schema#label, anonymous)
               Var (name=label)
               StatementSource (id=endpoint3, type=REMOTE)
