Riots can be in mid-1990s.Logical formLearned from9 sentences. Riots may spread to towns.Logical formLearned from9 sentences. A political-leader may order an end to some weeks of riots.Logical formLearned from9 sentences. An end can be to some weeks of riots.Logical formLearned from9 sentences. Riots can be a response to a visit.Logical formLearned from9 sentences. Riots can be in towns.Logical formLearned from9 sentences. (Riot police) may fire bullets.Logical formLearned from9 sentences. A person may quit after riots.Logical formLearned from9 sentences. (Riot police) may carry truncheons.Logical formLearned from9 sentences. Anger may explode into a third day of riots.Logical formLearned from9 sentences. Riots may die.Logical formLearned from9 sentences. Demonstrations may degenerate into riots.Logical formLearned from9 sentences. An office may be guarded by (riot police).Logical formLearned from9 sentences. Riots may erupt across a world-city.Logical formLearned from9 sentences. A strain may lead to riots.Logical formLearned from9 sentences.