A riot may begin as a demonstration.Logical formLearned from9 sentences. (Riot police) may be armed with automatic weapons.Logical formLearned from9 sentences. Riots can be between demonstrators.Logical formLearned from9 sentences. A crackdown can be by riot.Logical formLearned from9 sentences. (Riot police) may beat some (opposition supporters).Logical formLearned from9 sentences. Riots may mar gatherings.Logical formLearned from9 sentences. Riots can be in spiral.Logical formLearned from9 sentences. Riots can be by (government loyalists).Logical formLearned from9 sentences. A game may spark riots.Logical formLearned from9 sentences. Economic development may suffer after riots.Logical formLearned from9 sentences. Columns can be constituted-of-or-filled-with (riot police).Logical formLearned from9 sentences. Police can be with (riot helmets).Logical formLearned from9 sentences. Riots can be over a death of a student.Logical formLearned from9 sentences. Rocket can be on (riot squad bus).Logical formLearned from9 sentences. A (soccer riot) can be deadly.Logical formLearned from9 sentences.