diff --git a/naive-nlu/tree_nlu/knowledge_evaluation.py b/naive-nlu/tree_nlu/knowledge_evaluation.py
index 524bd56..031fd2d 100644
--- a/naive-nlu/tree_nlu/knowledge_evaluation.py
+++ b/naive-nlu/tree_nlu/knowledge_evaluation.py
@@ -208,6 +208,26 @@ def property_has_value(knowledge_base, elements, subj, prop, value):
         element=value
     )
 
+def perform_verb_over_object(knowledge_base, elements, subj, verb, obj):
+    subj = resolve(knowledge_base, elements, subj)
+    verb = resolve(knowledge_base, elements, verb)
+    obj = resolve(knowledge_base, elements, obj)
+
+    if subj not in knowledge_base:
+        knowledge_base[subj] = {'groups': set()}
+
+    if 'performs-over' not in knowledge_base[subj]:
+        knowledge_base[subj]['performs-over'] = {}
+
+    if verb not in knowledge_base[subj]['performs-over']:
+        knowledge_base[subj]['performs-over'][verb] = set()
+
+    return modifiable_element_for_existance_in_set(
+        container=knowledge_base[subj]['performs-over'],
+        set_name=verb,
+        element=obj
+    )
+
 
 knowledge_ingestion = {
     "exists-property-with-value": exists_property_with_value,
@@ -216,6 +236,7 @@ knowledge_ingestion = {
     "question": question,
     "implies": implies,
     "property-has-value": property_has_value,
+    "perform-verb-over-object": perform_verb_over_object,
 }
 
 
diff --git a/naive-nlu/tree_nlu/tests/gac_100.py b/naive-nlu/tree_nlu/tests/gac_100.py
index b2c31e0..7dc7b60 100644
--- a/naive-nlu/tree_nlu/tests/gac_100.py
+++ b/naive-nlu/tree_nlu/tests/gac_100.py
@@ -85,12 +85,13 @@ examples = [
              lambda knowledge: _assert('man' in knowledge.knowledge['socrates']['groups'])
          ),],
      }),
-    # {
-    #     "text": "Computers use electricity?",
-    #     "affirmation": "Computers use electricity?",
-    #     "parsed": (),
-    #     "answer": None,
-    # },
+    ('full_example',{
+        "text": "Computers use electricity?",
+        "affirmation": "Computers use electricity",
+        "parsed": ("question",
+                   ('perform-verb-over-object', 'computers', 'use', 'electricity')),
+        "answer": True,
+    }),
     # {
     #     "text": "The dominant language in france is french?",
     #     "affirmation": "The dominant language in france is french?",
@@ -664,6 +665,12 @@ base_knowledge = {
     'fly': {
         "groups": {'verb'},
     },
+    'use': {
+        "groups": {'verb'},
+    },
+    'electricity': {
+        "groups": {},
+    },
 }
 
 def main():