<http://www.marketingprofs.com/charts/2015/27502/are-marketers-ready-for-googles-search-algorithm-changes>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://www.marketingprofs.com/charts/2015/27502/are-marketers-ready-for-googles-search-algorithm-changes>