inputs: hypothesis: The riots in Greece started on December 6. premise: Tension and battles between Greek police and anarchist demonstrators took place in the centre of Athens, Greece, during the anti-war demonstration of the 4th European Social Forum which is taking place in the Greek capital, from 4 to 7 of May 2006. The march of the approximately 1,000 anarchists ended with clashes between groups of anarchists and police. Riot police used tear gas, while a branch of a Greek bank, a fast-food store and around 50 shop windows in central Athens were damaged.