A riot can be at a jail.Logical formLearned from16 sentences. Riots may erupt in a month.Logical formLearned from16 sentences. Riots may be sparked.Logical formLearned from16 sentences. Some (riot police) may be armed with batons.Logical formLearned from16 sentences. Riots can be in an unrest.Logical formLearned from16 sentences. (Riot police) may clash with protestors.Logical formLearned from15 sentences. Riots can be in some muslim countries.Logical formLearned from15 sentences. A riot can be unprecedented.Logical formLearned from15 sentences. Masterminds may pertain-to riots.Logical formLearned from15 sentences. (Riot police) may pertain-to a US-city.Logical formLearned from15 sentences. Leaders may pertain-to riots.Logical formLearned from15 sentences. Riots may undergo a suppression.Logical formLearned from15 sentences. Riots may occur in a US-city.Logical formLearned from15 sentences. (Riot police) may gather.Logical formLearned from15 sentences. Desires may hang (fire riot).Logical formLearned from15 sentences.