<http://schema.org/alternativeHeadline>
"<p>The London Marathon will get under way amid heightened security on Sunday, with 40 percent more officers on duty than in previous years, Scotland Yard said, following a double bombing at the Boston Marathon earlier this week.</p>"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.france24.com/en/20130420-london-marathon-high-security-boston-bombings-uk/>