diff --git a/Challenge/8.ttl b/Challenge/8.ttl
index 9ef6ae5..86ef469 100644
--- a/Challenge/8.ttl
+++ b/Challenge/8.ttl
@@ -29,7 +29,11 @@ envthes:
   a owl:Ontology, skos:ConceptScheme .
 
 envthes:30365
-  skos:prefLabel "ground"@en ;
+  rdfs:label "ground"@en ;
+  a skos:Concept .
+
+<https://lod.nal.usda.gov/nalt/104904>
+  rdfs:label "coarse woody debris"@en ;
   a skos:Concept .
 
 iadopt:hasObjectOfInterest