Update app.py

app.py

@@ -256,18 +256,18 @@ def run_entity_exploration():
         entity_info = ontology_manager.get_entity_info(selected_entity)
         display_entity_details(entity_info, ontology_manager)
 
-        if st.button("View this Entity in the Knowledge Graph"):
+        if st.button("View this Entity in the Knowledge Graph", key=f"view_entity_{selected_entity}"):
             st.session_state.central_entity = selected_entity
             st.rerun()
 
         st.subheader("Entity Neighborhood")
-        max_distance = st.slider("Maximum Neighborhood Distance", 1, 3, 1)
+        max_distance = st.slider("Maximum Neighborhood Distance", 1, 3, 1, key=f"distance_slider_{selected_entity}")
         neighborhood = knowledge_graph.get_entity_neighborhood(
             selected_entity,
             max_distance=max_distance,
             include_classes=True
         )
-    else:
+    elif not entities:
         st.warning("No entities found in the ontology.")
     
     if selected_entity: