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"National Nurses United members and environmental activists protest against the Keystone XL pipeline will marching over the Golden Gate Bridge on June 20, 2013 in San Francisco, California. More than a thousand people protested against the pipeline construction and called on the Obama administration to reject the proposal."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.gettyimages.it/evento/march-and-rally-at-golden-gate-bridge-protests-keystone-xl-pipeline-171118810>