<http://schema.org/url>
<http://www.businessweek.com/articles/2014-01-27/royal-caribbean-cruise-illness-spreads-to-600-passengers-dot-what-makes-cruises-prone-to-sickness>
<http://www.bloomberg.com/bw/articles/2014-01-27/royal-caribbean-cruise-illness-spreads-to-600-passengers-dot-what-makes-cruises-prone-to-sickness>