diff --git a/airflow/dags/EOSC_entity_trasform.py b/airflow/dags/EOSC_entity_trasform.py
index a35f4ad..cef71fc 100644
--- a/airflow/dags/EOSC_entity_trasform.py
+++ b/airflow/dags/EOSC_entity_trasform.py
@@ -115,18 +115,23 @@ def isEmpty(current_value: Dict[str, Any], labels: List[str]) -> bool:
 #
 def filter_product(p: dict) -> bool:
     if isEmpty(p, ["titles", "none"]):
+        print("missing title")
         return True
 
     if isEmpty(p, ["firstPublishDate"]):
+        print("missing date")
         return True
 
     if p['product_type'] == "literature":
         if isEmpty(p, ["abstracts", "none"]):
+            print("missing abstracts")
             return True
         if isEmpty(p, ["contributions", "person", "local_identifier"]):
+            print("missing creators")
             return True
     elif p['product_type'] in ["research data", "other"]:
         if isEmpty(p, ["contributions", "person", "local_identifier"]):
+            print("missing creators")
             return True
 
     return False
@@ -135,3 +140,5 @@ def filter_product(p: dict) -> bool:
 filter_entities = {
     "products": filter_product
 }
+
+