diff --git a/src/cco-extensions/ModalRelationOntology.ttl b/src/cco-extensions/ModalRelationOntology.ttl
index c106e75..dadae8c 100644
--- a/src/cco-extensions/ModalRelationOntology.ttl
+++ b/src/cco-extensions/ModalRelationOntology.ttl
@@ -267,7 +267,7 @@ mro:BFO_0000108 rdf:type owl:ObjectProperty ;
                 rdfs:range obo:BFO_0000008 ;
                 <http://purl.org/dc/elements/1.1/identifier> "118-BFO" ;
                 rdfs:label "exists at"@en ;
-                <http://www.w3.org/2004/02/skos/core#definition> "(Elucidation) exists at is a relation between a particular and some temporal region at which the particular exists"@en ;
+                <http://www.w3.org/2004/02/skos/core#definition> "(Elucidation) exists at is a relation between an instance of Entity and some temporal region where the particular exists"@en ;
                 <http://www.w3.org/2004/02/skos/core#example> "First World War exists at 1914-1916; Mexico exists at January 1, 2000"@en .