diff --git a/public/owl/map.owl.ttl b/public/owl/map.owl.ttl
index 22051709..a077d8a5 100644
--- a/public/owl/map.owl.ttl
+++ b/public/owl/map.owl.ttl
@@ -25,7 +25,7 @@ mm:topic2 a owl:ObjectProperty ;
 	a owl:FunctionalProperty ;
 	rdfs:label "second topic of a synapse"@en ;
 	rdfs:domain mm:Topic ;
-	rdfs:range owl:Thing .
+	rdfs:range mm:Topic .
 
 mm:mapper a owl:ObjectProperty ;
   a owl:FunctionalProperty ;
@@ -38,5 +38,3 @@ mm:direction a owl:ObjectProprty ;
   rdfs:label "from-to, both, or none"@en ;
   rdfs:domain mm:Synapse ;
   rdfs:range [ owl:oneOf mm:from-to, mm:both, mm:none ] .
-
-mm:frome-to a owl: