<https://inthecloud247.com/secure-your-twitter-account-with-a-fido-security-key/fido-u2f-twitter19-ios/#primaryimage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://inthecloud247.com/secure-your-twitter-account-with-a-fido-security-key/fido-u2f-twitter19-ios/>