diff --git a/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/enrich/ADS/ordered_sparql_insert_304.sparql b/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/enrich/ADS/ordered_sparql_insert_304.sparql
index 02437d9..aafcff5 100644
--- a/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/enrich/ADS/ordered_sparql_insert_304.sparql
+++ b/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/enrich/ADS/ordered_sparql_insert_304.sparql
@@ -86,6 +86,10 @@ WHERE {
     ?collection aocat:has_ARIADNE_subject ?archeologicalResourceType .
 };
 
+PREFIX aocat: <https://www.ariadne-infrastructure.eu/resource/ao/cat/1.1/>
+PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
+PREFIX skos: <http://www.w3.org/2004/02/skos/core#>
+
 INSERT {
     GRAPH <https://ariadne-infrastructure.eu/api_________::ariadne_plus::ads::304> {
       ?s	aocat:has_native_subject <https://ariadne-infrastructure.eu/aocat/Concept/ads/NOT_PROVIDED> .