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PHILADELPHIA, PA - JULY 28: A woman walks with a sign supporting legalizing marijuana during the Democratic National Convention (DNC) on July 28, 2016 in Philadelphia, Pennsylvania. The convention officially began on Monday and has attracted thousands of protesters, members of the media and Democratic delegates to the City of Brotherly Love. (Photo by Spencer Platt/Getty Images)

PHILADELPHIA, PA - JULY 28: A woman walks with a sign supporting legalizing marijuana during the Democratic National Convention (DNC) on July 28, 2016 in Philadelphia, Pennsylvania. The convention officially began on Monday and has attracted thousands of protesters, members of the media and Democratic delegates to the City of Brotherly Love.  (Photo by Spencer Platt/Getty Images)