diff --git a/src/owl/bfo-core.ofn b/src/owl/bfo-core.ofn
index 203abae..709424e 100644
--- a/src/owl/bfo-core.ofn
+++ b/src/owl/bfo-core.ofn
@@ -827,7 +827,7 @@ SubClassOf(<http://purl.obolibrary.org/obo/BFO_0000142> ObjectAllValuesFrom(<htt
 
 AnnotationAssertion(dc11:identifier <http://purl.obolibrary.org/obo/BFO_0000145> "057-BFO")
 AnnotationAssertion(rdfs:label <http://purl.obolibrary.org/obo/BFO_0000145> "relational quality"@en)
-AnnotationAssertion(skos:definition <http://purl.obolibrary.org/obo/BFO_0000145> "b is a relational quality =Def b is a quality & there exists c and d such that b and c are not identical & b specifically depends on c & b specifically depends on d"@en)
+AnnotationAssertion(skos:definition <http://purl.obolibrary.org/obo/BFO_0000145> "b is a relational quality =Def b is a quality & there exists c and d such that c and d are not identical & b specifically depends on c & b specifically depends on d"@en)
 AnnotationAssertion(skos:example <http://purl.obolibrary.org/obo/BFO_0000145> "A marriage bond; an instance of love; an obligation between one person and another"@en)
 SubClassOf(<http://purl.obolibrary.org/obo/BFO_0000145> <http://purl.obolibrary.org/obo/BFO_0000019>)
 
diff --git a/src/owl/bfo-core.owl b/src/owl/bfo-core.owl
index e88a0c3..4f271b8 100644
--- a/src/owl/bfo-core.owl
+++ b/src/owl/bfo-core.owl
@@ -2466,7 +2466,7 @@
     <AnnotationAssertion>
         <AnnotationProperty abbreviatedIRI="skos:definition"/>
         <IRI>http://purl.obolibrary.org/obo/BFO_0000145</IRI>
-        <Literal xml:lang="en">b is a relational quality =Def b is a quality &amp; there exists c and d such that b and c are not identical &amp; b specifically depends on c &amp; b specifically depends on d</Literal>
+        <Literal xml:lang="en">b is a relational quality =Def b is a quality &amp; there exists c and d such that c and d are not identical &amp; b specifically depends on c &amp; b specifically depends on d</Literal>
     </AnnotationAssertion>
     <AnnotationAssertion>
         <AnnotationProperty abbreviatedIRI="skos:example"/>
diff --git a/src/owl/bfo-core.ttl b/src/owl/bfo-core.ttl
index 5d9d290..70d3300 100644
--- a/src/owl/bfo-core.ttl
+++ b/src/owl/bfo-core.ttl
@@ -1109,7 +1109,7 @@ skos:scopeNote rdf:type owl:AnnotationProperty .
                                              rdfs:subClassOf <http://purl.obolibrary.org/obo/BFO_0000019> ;
                                              dc11:identifier "057-BFO" ;
                                              rdfs:label "relational quality"@en ;
-                                             skos:definition "b is a relational quality =Def b is a quality & there exists c and d such that b and c are not identical & b specifically depends on c & b specifically depends on d"@en ;
+                                             skos:definition "b is a relational quality =Def b is a quality & there exists c and d such that c and d are not identical & b specifically depends on c & b specifically depends on d"@en ;
                                              skos:example "A marriage bond; an instance of love; an obligation between one person and another"@en .