diff --git a/VERSION b/VERSION
index ee6cdce..b616048 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.6.1
+0.6.2
diff --git a/examples/ogp-example.html b/examples/ogp-example.html
new file mode 100644
index 0000000..c060d58
--- /dev/null
+++ b/examples/ogp-example.html
@@ -0,0 +1,44 @@
+
+
+The Rock (1996)
+
+
+
+
+
+
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+
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+
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+...
+
diff --git a/lib/rdf/reasoner/extensions.rb b/lib/rdf/reasoner/extensions.rb
index bccc680..c62f966 100644
--- a/lib/rdf/reasoner/extensions.rb
+++ b/lib/rdf/reasoner/extensions.rb
@@ -264,7 +264,7 @@ def lint
end
# Must be a defined property
- if term && term.property?
+ if term.respond_to?(:property?) && term.property?
# Warn against using a deprecated term
superseded = term.attributes[:'schema:supersededBy']
superseded = superseded.pname if superseded.respond_to?(:pname)