diff --git a/config/migrations/2024/20240704112300-related-organizations-as-memberships/20240704112600-founding-members.sparql b/config/migrations/2024/20240704112300-related-organizations-as-memberships/20240704112600-founding-members.sparql
index 6264ca4..d06fdb9 100644
--- a/config/migrations/2024/20240704112300-related-organizations-as-memberships/20240704112600-founding-members.sparql
+++ b/config/migrations/2024/20240704112300-related-organizations-as-memberships/20240704112600-founding-members.sparql
@@ -1,22 +1,22 @@
 PREFIX skos: <http://www.w3.org/2004/02/skos/core#>
 PREFIX org: <http://www.w3.org/ns/org#>
 PREFIX mu: <http://mu.semte.ch/vocabularies/core/>
+PREFIX ext: <http://mu.semte.ch/vocabularies/ext/>
 
 DELETE {
   GRAPH ?g {
-    ?foundingOrg <http://mu.semte.ch/vocabularies/ext/isFounderOfOrganization> ?foundedOrg.
+    ?foundingOrg ext:isFounderOfOrganization ?foundedOrg .
   }
 }
 INSERT {
   GRAPH ?g {
-    ?foundingOrg org:memberOf ?foundedOrg.
+    ?foundingOrg org:memberOf ?foundedOrg .
 
-    ?membership
-      a org:Membership;
-      mu:uuid ?uuid;
-      org:organization ?foundedOrg;
-      org:member ?foundingOrg;
-      org:role <http://data.lblod.info/id/rollen/73d5e1cf250d42fab15926771f07505a>.
+    ?membership a org:Membership ;
+      mu:uuid ?uuid ;
+      org:organization ?foundedOrg ;
+      org:member ?foundingOrg ;
+      org:role <http://data.lblod.info/id/rollen/73d5e1cf250d42fab15926771f07505a> . # stichtend lid
   }
 }
 WHERE {
@@ -27,7 +27,7 @@ WHERE {
     }
 
     GRAPH ?g {
-      ?foundingOrg <http://mu.semte.ch/vocabularies/ext/isFounderOfOrganization> ?foundedOrg.
+      ?foundingOrg ext:isFounderOfOrganization ?foundedOrg .
     }
 
   BIND(SHA1(CONCAT(STR(?foundingOrg), STR(?foundedOrg), "founded by")) as ?uuid)
diff --git a/config/migrations/2024/20240704112300-related-organizations-as-memberships/20240704112700-participants.sparql b/config/migrations/2024/20240704112300-related-organizations-as-memberships/20240704112700-participants.sparql
index c8730be..80797f2 100644
--- a/config/migrations/2024/20240704112300-related-organizations-as-memberships/20240704112700-participants.sparql
+++ b/config/migrations/2024/20240704112300-related-organizations-as-memberships/20240704112700-participants.sparql
@@ -4,12 +4,11 @@ PREFIX mu: <http://mu.semte.ch/vocabularies/core/>
 
 INSERT {
   GRAPH ?g {
-    ?membership
-      a org:Membership;
-      mu:uuid ?uuid;
-      org:organization ?organization;
-      org:member ?memberOrganization;
-      org:role <http://data.lblod.info/id/rollen/2152eb830b1143bfb97a7dd9596d6c63>.
+    ?membership a org:Membership ;
+      mu:uuid ?uuid ;
+      org:organization ?organization ;
+      org:member ?memberOrganization ;
+      org:role <http://data.lblod.info/id/rollen/2152eb830b1143bfb97a7dd9596d6c63> . # participant
   }
 }
 WHERE {
@@ -20,9 +19,9 @@ WHERE {
     }
 
     GRAPH ?g {
-      ?memberOrganization org:memberOf ?organization.
+      ?memberOrganization org:memberOf ?organization .
     }
 
   BIND(SHA1(CONCAT(STR(?memberOrganization), STR(?organization), "member of")) as ?uuid)
   BIND(IRI(CONCAT("http://data.lblod.info/id/lidmaatschap/", ?uuid)) AS ?membership)
-}
\ No newline at end of file
+}
diff --git a/config/migrations/2024/20240704112300-related-organizations-as-memberships/20240704112800-related-members.sparql b/config/migrations/2024/20240704112300-related-organizations-as-memberships/20240704112800-related-members.sparql
index f9cd3a6..908ec5a 100644
--- a/config/migrations/2024/20240704112300-related-organizations-as-memberships/20240704112800-related-members.sparql
+++ b/config/migrations/2024/20240704112300-related-organizations-as-memberships/20240704112800-related-members.sparql
@@ -4,19 +4,18 @@ PREFIX mu: <http://mu.semte.ch/vocabularies/core/>
 
 DELETE {
   GRAPH ?g {
-    ?organization org:hasSubOrganization ?subOrganization.
+    ?organization org:hasSubOrganization ?subOrganization .
   }
 }
 INSERT {
   GRAPH ?g {
-    ?subOrganization org:memberOf ?organization.
+    ?subOrganization org:memberOf ?organization .
 
-    ?membership
-      a org:Membership;
-      mu:uuid ?uuid;
-      org:organization ?organization;
-      org:member ?subOrganization;
-      org:role <http://data.lblod.info/id/rollen/4ec7d5c39bdc4e84b4174379b9e22ad8>.
+    ?membership a org:Membership ;
+      mu:uuid ?uuid ;
+      org:organization ?organization ;
+      org:member ?subOrganization ;
+      org:role <http://data.lblod.info/id/rollen/4ec7d5c39bdc4e84b4174379b9e22ad8> . # gerelateerd
   }
 }
 WHERE {