<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://pop.h-cdn.co/assets/cm/15/05/54cb0fbae3f8e_-_bay-bridge-sas-01-0413-mdn.jpg>
<http://www.popularmechanics.com/technology/infrastructure/a9001/how-the-new-bay-bridge-shakes-off-a-quake-15450209/>