diff --git a/actes-princiers/conf/base/catalog.yml b/actes-princiers/conf/base/catalog.yml
index 50fbde8..62276b4 100644
--- a/actes-princiers/conf/base/catalog.yml
+++ b/actes-princiers/conf/base/catalog.yml
@@ -1,9 +1,16 @@
-# houses
-# input (read only) dataset
+# houses and princes 
+# input (read only) datasets
 houses:
   type: yaml.YAMLDataSet
   filepath: data/01_raw/yaml/houses.yaml
 
+houses_trigram:
+  type: json.JSONDataSet
+  filepath: data/01_raw/json/house_trigram.json
+
+prince_bigram:
+  type: json.JSONDataSet
+  filepath: data/01_raw/json/prince_bigram.json
 # ________________________________________________________________________
 # BOURBON
 # input (read only) dataset
diff --git a/actes-princiers/src/actes_princiers/pipelines/populate_mongo/nodes.py b/actes-princiers/src/actes_princiers/pipelines/populate_mongo/nodes.py
index 8bdb6ab..7cac618 100755
--- a/actes-princiers/src/actes_princiers/pipelines/populate_mongo/nodes.py
+++ b/actes-princiers/src/actes_princiers/pipelines/populate_mongo/nodes.py
@@ -5,10 +5,11 @@ from pathlib import Path
 from typing import Dict
 
 from mongoengine import connect
-from mongoengine import Document, StringField
+from mongoengine import Document, StringField, DictField
 
 from kedro.framework.session import KedroSession
 from kedro.extras.datasets.yaml import YAMLDataSet
+from kedro.extras.datasets.json import JSONDataSet
 
 from actesdataset import JSONDataSetCollection
 
@@ -16,6 +17,10 @@ from actesdataset import JSONDataSetCollection
 logger = logging.getLogger(__name__)
 
 
+class Helpers(Document):
+    house_trigram = DictField()
+    prince_bigram = DictField()
+
 # Database schemas
 class House(Document):
     "_id is the name"
@@ -36,6 +41,7 @@ class Acte(Document):
     ref_acte = StringField(required=True, max_length=100)
     xmlcontent = StringField(required=True) # no max_length 
 
+
 # pipeline functions
 def populate_mongo(jsondoc: JSONDataSetCollection, storage_ip: str, db_name: str, db_collection_name: str, mongodb_admin: str, mongodb_password: str) -> None:
 
@@ -94,3 +100,8 @@ def load_houses(yamldoc: YAMLDataSet, storage_ip: str, db_name: str, mongodb_adm
     #myclient.close()
     
     return
+    
+def load_helpers(house_trigram: JSONDataSet, prince_bigram: JSONDataSet) -> None:
+    helper_entry = Helpers(house_trigram=house_trigram, prince_bigram=prince_bigram)
+    helper_entry.save()
+    
diff --git a/actes-princiers/src/actes_princiers/pipelines/populate_mongo/pipeline.py b/actes-princiers/src/actes_princiers/pipelines/populate_mongo/pipeline.py
index f4ed3bf..c6fc3d5 100755
--- a/actes-princiers/src/actes_princiers/pipelines/populate_mongo/pipeline.py
+++ b/actes-princiers/src/actes_princiers/pipelines/populate_mongo/pipeline.py
@@ -1,6 +1,6 @@
 from kedro.pipeline import Pipeline, node, pipeline
 
-from .nodes import populate_mongo, load_houses
+from .nodes import populate_mongo, load_houses, load_helpers
 
 
 def create_pipeline(**kwargs) -> Pipeline:
@@ -22,8 +22,16 @@ def create_pipeline(**kwargs) -> Pipeline:
                 outputs=None,
                 name="polulate_houses",
                 tags="populate_database",
+            ),
+            node(
+                func=load_helpers,
+                inputs=["houses_trigram","prince_bigram"],
+                outputs=None,
+                name="populate_helpers",
+                tags="populate_database",
             )
             
+            
         ]
     )