<http://schema.org/thumbnailUrl>
<http://cdn1.tnwcdn.com/wp-content/blogs.dir/1/files/2011/10/gmail-520x245.jpg>
<http://thenextweb.com/apple/2011/11/01/could-a-native-gmail-iphone-app-finally-be-on-the-way-and-will-people-use-it/>