<http://schema.org/url>
<http://www.businessweek.com/articles/2014-04-29/love-or-hate-it-spirit-airlines-has-found-a-solid-business-in-cheap-fares>
<http://www.bloomberg.com/bw/articles/2014-04-29/love-or-hate-it-spirit-airlines-has-found-a-solid-business-in-cheap-fares>