diff --git a/TimeOntology.ttl b/TimeOntology.ttl
index 81ab763..900325f 100644
--- a/TimeOntology.ttl
+++ b/TimeOntology.ttl
@@ -20,17 +20,6 @@
 #    Object Properties
 #################################################################
 
-###  http://www.ontologyrepository.com/CommonCoreOntologies/has_ending_instant
-cco:has_ending_instant rdf:type owl:ObjectProperty ;
-                       owl:inverseOf cco:is_ending_instant_of ;
-                       rdf:type owl:FunctionalProperty ;
-                       rdfs:domain obo:BFO_0000038 ;
-                       rdfs:range obo:BFO_0000148 ;
-                       cco:definition "For Temporal Interval t1 and Temporal Instant t2, t1 has ending instant t2 if and only if no Temporal Instant t3 that is part of t1 is after t2."@en ;
-                       cco:is_curated_in_ontology "http://www.ontologyrepository.com/CommonCoreOntologies/Mid/TimeOntology"^^xsd:anyURI ;
-                       rdfs:label "has ending instant"@en .
-
-
 ###  http://www.ontologyrepository.com/CommonCoreOntologies/has_inside_instant
 cco:has_inside_instant rdf:type owl:ObjectProperty ;
                        owl:inverseOf cco:is_inside_instant_of ;
@@ -52,17 +41,6 @@ cco:has_inside_interval rdf:type owl:ObjectProperty ;
                         rdfs:label "has inside interval"@en .
 
 
-###  http://www.ontologyrepository.com/CommonCoreOntologies/has_starting_instant
-cco:has_starting_instant rdf:type owl:ObjectProperty ;
-                         owl:inverseOf cco:is_starting_instant_of ;
-                         rdf:type owl:FunctionalProperty ;
-                         rdfs:domain obo:BFO_0000038 ;
-                         rdfs:range obo:BFO_0000148 ;
-                         cco:definition "For Temporal Interval t1 and Temporal Instant t2, t1 has starting instant t2 if and only if no temporal instant t3 that is part of t1 is before t2."@en ;
-                         cco:is_curated_in_ontology "http://www.ontologyrepository.com/CommonCoreOntologies/Mid/TimeOntology"^^xsd:anyURI ;
-                         rdfs:label "has starting instant"@en .
-
-
 ###  http://www.ontologyrepository.com/CommonCoreOntologies/instant_is_after
 cco:instant_is_after rdf:type owl:ObjectProperty ;
                      owl:inverseOf cco:instant_is_before ;
@@ -244,16 +222,6 @@ cco:interval_starts rdf:type owl:ObjectProperty ;
                     rdfs:label "interval starts"@en .
 
 
-###  http://www.ontologyrepository.com/CommonCoreOntologies/is_ending_instant_of
-cco:is_ending_instant_of rdf:type owl:ObjectProperty ,
-                                  owl:InverseFunctionalProperty ;
-                         rdfs:domain obo:BFO_0000148 ;
-                         rdfs:range obo:BFO_0000038 ;
-                         cco:definition "For Temporal Instant t1 and Temporal Interval t2, t1 is ending instant of t2 if and only if no Temporal Instant t3 that is part of t2 is after t1."@en ;
-                         cco:is_curated_in_ontology "http://www.ontologyrepository.com/CommonCoreOntologies/Mid/TimeOntology"^^xsd:anyURI ;
-                         rdfs:label "is ending instant of"@en .
-
-
 ###  http://www.ontologyrepository.com/CommonCoreOntologies/is_inside_instant_of
 cco:is_inside_instant_of rdf:type owl:ObjectProperty ;
                          rdfs:domain obo:BFO_0000148 ;
@@ -263,16 +231,6 @@ cco:is_inside_instant_of rdf:type owl:ObjectProperty ;
                          rdfs:label "is inside instant of"@en .
 
 
-###  http://www.ontologyrepository.com/CommonCoreOntologies/is_starting_instant_of
-cco:is_starting_instant_of rdf:type owl:ObjectProperty ,
-                                    owl:InverseFunctionalProperty ;
-                           rdfs:domain obo:BFO_0000148 ;
-                           rdfs:range obo:BFO_0000038 ;
-                           cco:definition "For Temporal Instant t1 and Temporal Interval t2, t1 is starting instant of t2 if and only if no Temporal Instant t3 that is part of t2 is before t1."@en ;
-                           cco:is_curated_in_ontology "http://www.ontologyrepository.com/CommonCoreOntologies/Mid/TimeOntology"^^xsd:anyURI ;
-                           rdfs:label "is starting instant of"@en .
-
-
 #################################################################
 #    Classes
 #################################################################