diff --git a/config/reasoner/dl2op/private-info/query.n3q b/config/reasoner/dl2op/private-info/query.n3q
index 12e94f2..bddbb11 100644
--- a/config/reasoner/dl2op/private-info/query.n3q
+++ b/config/reasoner/dl2op/private-info/query.n3q
@@ -47,6 +47,12 @@ PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
   ?s persoon:registratie ?o
 }.
 
+{
+  ?s a <http://www.w3.org/ns/adms#Identifier>
+ } => {
+  ?s a <http://www.w3.org/ns/adms#Identifier>
+}.
+
 # Nationality
 {
   ?s persoon:heeftNationaliteit ?o