QueryRoot
   Projection
      ProjectionElemList
         ProjectionElem "person"
      NUnion
         Extension (new scope)
            EmptyNJoin
               ExclusiveStatement
                  Var (name=person)
                  Var (name=_const_23b7c3b6_uri, value=http://xmlns.com/foaf/0.1/name, anonymous)
                  Var (name=name)
                  StatementSource (id=endpoint1, type=REMOTE)
               EmptyStatementPattern
                  Var (name=person)
                  Var (name=_const_4240a169_uri, value=urn:doesNotExistProp, anonymous)
                  Var (name=obj)
            ExtensionElem (nameOut)
               Var (name=name)
         ExclusiveStatement
            Var (name=person)
            Var (name=_const_ea9562d5_uri, value=http://xmlns.com/foaf/0.1/interest, anonymous)
            Var (name=o)
            StatementSource (id=endpoint2, type=REMOTE)
