diff --git a/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/PrepareRelationsJob.java b/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/PrepareRelationsJob.java
index 601cf6449..eb63d4423 100644
--- a/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/PrepareRelationsJob.java
+++ b/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/PrepareRelationsJob.java
@@ -156,6 +156,7 @@ public class PrepareRelationsJob {
 			.parquet(outputPath);
 	}
 
+	// experimental
 	private static void prepareRelationsDataset(
 		SparkSession spark, String inputRelationsPath, String outputPath, Set<String> relationFilter, int maxRelations,
 		int relPartitions) {
diff --git a/dhp-workflows/dhp-graph-provision/src/main/resources/eu/dnetlib/dhp/oa/provision/oozie_app/workflow.xml b/dhp-workflows/dhp-graph-provision/src/main/resources/eu/dnetlib/dhp/oa/provision/oozie_app/workflow.xml
index 697a00a09..faa81ad64 100644
--- a/dhp-workflows/dhp-graph-provision/src/main/resources/eu/dnetlib/dhp/oa/provision/oozie_app/workflow.xml
+++ b/dhp-workflows/dhp-graph-provision/src/main/resources/eu/dnetlib/dhp/oa/provision/oozie_app/workflow.xml
@@ -134,6 +134,7 @@
             <arg>--inputRelationsPath</arg><arg>${inputGraphRootPath}/relation</arg>
             <arg>--outputPath</arg><arg>${workingDir}/relation</arg>
             <arg>--maxRelations</arg><arg>${maxRelations}</arg>
+            <arg>--relationFilter</arg><arg>${relationFilter}</arg>
             <arg>--relPartitions</arg><arg>5000</arg>
         </spark>
         <ok to="fork_join_related_entities"/>