<http://schema.org/url>
<http://www.dailybulletin.com/social-affairs/20131007/apollo-astronaut-rusty-schweickart-warns-of-asteroids-at-college-ceremony>
<http://www.whittierdailynews.com/social-affairs/20131007/apollo-astronaut-rusty-schweickart-warns-of-asteroids-at-college-ceremony>