<http://schema.org/mainEntityOfPage>
<http://www.tmz.com/2010/09/03/tennis-fans-brawl-us-open-djokovic-philipp-petzschner-fight-footage-video/>
<http://www.tmz.com/2010/09/03/tennis-fans-brawl-us-open-djokovic-philipp-petzschner-fight-footage-video/5/>