diff --git a/ontology/uco-bfo.ttl b/ontology/uco-bfo.ttl
index 353a6c2..9444b5e 100644
--- a/ontology/uco-bfo.ttl
+++ b/ontology/uco-bfo.ttl
@@ -20,6 +20,12 @@
 		;
 	.
 
+drafting:Event
+	a owl:Class ;
+	rdfs:subClassOf obo:BFO_0000008 ;
+	rdfs:isDefinedBy <https://github.com/ucoProject/UCO/issues/541> ;
+	.
+
 uco-observable:File
 	rdfs:subClassOf obo:BFO_0000031 ;
 	.
diff --git a/tests/exemplars.ttl b/tests/exemplars.ttl
index cc43f51..a4224cc 100644
--- a/tests/exemplars.ttl
+++ b/tests/exemplars.ttl
@@ -18,6 +18,10 @@
 	owl:imports <http://example.org/ontology/uco-bfo> ;
 	.
 
+kb:Event-36ca992e-47e5-43a5-b344-71465c222a05
+	a drafting:Event ;
+	.
+
 kb:File-e364d7d2-25c8-4d4a-95d1-b03f73934e83
 	a uco-observable:File ;
 	.