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SAN FRANCISCO, USA - MARCH 10: Protestors gather in front of City Hall during a protest in solidarity with the Standing Rock Sioux Tribe against the construction of the Dakota Access Pipeline, in San Francisco, United States on March 10, 2017. (Photo by Joel Angel Juarez/Anadolu Agency/Getty Images)

SAN FRANCISCO, USA - MARCH 10: Protestors gather in front of City Hall during a protest in solidarity with the Standing Rock Sioux Tribe against the construction of the Dakota Access Pipeline, in San Francisco, United States on March 10, 2017. (Photo by Joel Angel Juarez/Anadolu Agency/Getty Images)