<http://schema.org/image>
<http://cdn1.tnwcdn.com/wp-content/blogs.dir/1/files/2012/12/Chalkboard-SEO-class-645x250-520x245.jpg>
<http://thenextweb.com/insider/2013/09/20/online-training-site-simplilearn-prepping-mobile-version-and-ios-android-apps/>