(Portland, OR)  --  A demonstrator who set the Portland Justice Center on fire last September has been sentenced to four years in prison.  Cyan Bass admitted to breaking windows in the Justice Center and using a flammable liquid to set the building on fire.  It caused 46-thousand dollars in damage.  He also ran into Chapman Square and threw a lit Molotov cocktail at officers.  Bass was convicted of several charges including arson and attempted assault.