<http://schema.org/thumbnailUrl>
<https://tctechcrunch2011.files.wordpress.com/2013/09/facebook-updated-screenshot-ios-7.png?w=148>
<https://techcrunch.com/2013/09/18/facebooks-new-mobile-test-framework-births-bottom-tab-bar-navigation-redesign-for-ios-5-6-7/>