<https://www.ilounge.com/news/ios-twitter-rolls-out-sign-in-option-on-ipad-and-iphone/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.ilounge.com/news/ios-twitter-rolls-out-sign-in-option-on-ipad-and-iphone>