diff --git a/ArtifactOntology.ttl b/ArtifactOntology.ttl
index b59cb5e..21bc67d 100644
--- a/ArtifactOntology.ttl
+++ b/ArtifactOntology.ttl
@@ -4210,7 +4210,8 @@ cco:SniperRifle rdf:type owl:Class ;
 cco:SolarPanel rdf:type owl:Class ;
                rdfs:subClassOf cco:ElectricalPowerSource ;
                cco:definition "An Electrical Power Source that consists in part of one or more photovoltaic (i.e. solar) cells that convert light energy (photons) directly into electricity by means of the photovoltaic effect."@en ;
-               cco:definition_source "https://en.wikipedia.org/wiki/Solar_panel and https://en.wikipedia.org/wiki/Solar_cell" ;
+               cco:definition_source "https://en.wikipedia.org/wiki/Solar_panel" ;
+               cco:definition_source "https://en.wikipedia.org/wiki/Solar_cell" ;
                cco:is_curated_in_ontology "http://www.ontologyrepository.com/CommonCoreOntologies/Mid/ArtifactOntology"^^xsd:anyURI ;
                rdfs:label "Solar Panel"@en .