diff --git a/naive-nlu/tree_nlu/parsing.py b/naive-nlu/tree_nlu/parsing.py
index b43084e..b06e18b 100644
--- a/naive-nlu/tree_nlu/parsing.py
+++ b/naive-nlu/tree_nlu/parsing.py
@@ -423,7 +423,7 @@ def all_matching_indexes(knowledge_base, collection, element):
 
 def element_matches_groups(knowledge, element: Dict, groups):
     if isinstance(groups, str) and groups in knowledge:
-        return len(knowledge[element].get("groups", set()) & element['groups']) > 0
+        return len(knowledge[groups].get("groups", set()) & element['groups']) > 0
     elif isinstance(groups, dict):
         return len(element.get("groups", set()) & element['groups']) > 0
     return False