<http://schema.org/thumbnailUrl>
<https://gigaom.com/wp-content/uploads/sites/1/2011/05/2583886589_01ce541f8a_z.png>
<http://gigaom.com/2013/10/10/why-twitter-is-testing-a-real-time-news-service-when-it-already-is-a-real-time-news-service/>