<http://schema.org/mainEntityOfPage>
<http://blogs.wsj.com/venturecapital/2011/07/18/the-daily-start-up-happy-tears-for-dry-eye-disease/>
<http://blogs.wsj.com/venturecapital/2011/07/18/the-daily-start-up-happy-tears-for-dry-eye-disease/>