add some comments
diff --git a/docs/x509.rst b/docs/x509.rst
index a8beb20..6bb7c9a 100644
--- a/docs/x509.rst
+++ b/docs/x509.rst
@@ -760,9 +760,10 @@
>>> from cryptography.hazmat.backends import default_backend
>>> from cryptography.hazmat.primitives import hashes
>>> cert = x509.load_pem_x509_certificate(cryptography_cert_pem, default_backend())
+ >>> # Get the subjectAltName extension from the certificate
>>> ext = cert.extensions.get_extension_for_oid(x509.OID_SUBJECT_ALTERNATIVE_NAME)
- >>> san = ext.value
- >>> san.get_values_for_type(x509.DNSName)
+ >>> # Get the dNSName entries from the SAN extension
+ >>> ext.value.get_values_for_type(x509.DNSName)
[u'www.cryptography.io', u'cryptography.io']