diff --git a/src/cco-modules/AgentOntology.ttl b/src/cco-modules/AgentOntology.ttl
index 7cfe3c7..cf1f451 100644
--- a/src/cco-modules/AgentOntology.ttl
+++ b/src/cco-modules/AgentOntology.ttl
@@ -25,8 +25,6 @@
 
 ###  http://purl.org/dc/terms/bibliographicCitation
 dcterms:bibliographicCitation rdf:type owl:AnnotationProperty .
-dcterms:bibliographicCitation rdf:type owl:AnnotationProperty .
-
 
 ###  http://purl.org/dc/terms/created
 dcterms:created rdf:type owl:AnnotationProperty .