adding reference to issue 89. This ontology provides an example that answers it.
--- a/ontology/examples/ontology-extensions/vehicle/vehicle.ttl Tue Oct 04 12:57:38 2011 -0400
+++ b/ontology/examples/ontology-extensions/vehicle/vehicle.ttl Tue Oct 04 13:25:44 2011 -0400
@@ -4,6 +4,10 @@
@prefix prov: <http://dvcs.w3.org/hg/prov/raw-file/tip/ontology/ProvenanceOntology.owl> .
@prefix vehicle: <http://dvcs.w3.org/hg/prov/raw-file/tip/ontology/examples/ontology-extensions/vehicle/vehicle.ttl#> .
+<>
+ rdfs:seeAlso <http://www.w3.org/2011/prov/track/issues/89>;
+.
+
vehicle:Vehicle
rdfs:label "Vehicle";
rdfs:subClassOf prov:Entity;