Getting xpath child node value

I am having trouble getting the text "TestTwo" where the parent has an attribute with Name=SN from the XML below. I am able to get the SimpleXMLElement, but cannot figure out how to get the child.

What is the best way to return the text "TestTwo"?

Thank you!

$xml = simplexml_load_string($XMLBELOW); $xml->registerXPathNamespace('s','urn:oasis:names:tc:SAML:2.0:assertion'); $result = $xml->xpath("//s:Attribute[@Name='sn']"); var_dump( $result); $XMLBELOW = <<<XML <?xml version="1.0" ?> <saml2:Assertion ID="SAML-4324423" IssueInstant="2012-09-24T17:49:39Z" Version="2.0" xmlns:saml2="urn:oasis:names:tc:SAML:2.0:assertion"> <saml2:Issuer> Test </saml2:Issuer> <saml2:Subject> <saml2:NameID Format="urn:oasis:names:tc:SAML:1.1:nameid-format:unspecified" NameQualifier="Test"> Tester </saml2:NameID> <saml2:SubjectConfirmation Method="urn:oasis:names:tc:SAML:2.0:cm:bearer"> <saml2:SubjectConfirmationData NotBefore="2012-09-24T17:48:39Z" NotOnOrAfter="2012-09-24T17:51:39Z"/> </saml2:SubjectConfirmation> </saml2:Subject> <saml2:Conditions NotBefore="2012-09-24T17:48:39Z" NotOnOrAfter="2012-09-24T17:51:39Z"/> <saml2:AuthnStatement AuthnInstant="2012-09-24T17:49:39Z" SessionNotOnOrAfter="2012-09-24T17:51:39Z"> <saml2:SubjectLocality Address="105.57.487.48"/> <saml2:AuthnContext> <saml2:AuthnContextClassRef> urn:oasis:names:tc:SAML:2.0:ac:classes:unspecified </saml2:AuthnContextClassRef> </saml2:AuthnContext> </saml2:AuthnStatement> <saml2:AttributeStatement> <saml2:Attribute Name="sn" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:unspecified"> <saml2:AttributeValue> TestTwo </saml2:AttributeValue> </saml2:Attribute> <saml2:Attribute Name="departmentNumber" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:unspecified"> <saml2:AttributeValue> OPERS </saml2:AttributeValue> </saml2:Attribute> </saml2:AttributeStatement> </saml2:Assertion> XML;