<http://schema.org/headline>
"Katy Perry&amp;#039;s &amp;#039;Dark Horse&amp;#039; spends fourth week at No.1 in US"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/music/news/a552675/katy-perrys-dark-horse-spends-fourth-week-at-no1-in-us/>