A result can be a riot.Logical formLearned from12 sentences. Persons can be a riot.Logical formLearned from12 sentences. A scale may pertain-to riots.Logical formLearned from12 sentences. Riots can be in a history.Logical formLearned from12 sentences. A dispersal can be by (riot police).Logical formLearned from12 sentences. Riots may spread to areas.Logical formLearned from12 sentences. (Riot police) may fight with fans.Logical formLearned from12 sentences. Police may quell a riot.Logical formLearned from12 sentences. Demonstrators may scuffle with (riot police).Logical formLearned from12 sentences. An investigation can be into a riot.Logical formLearned from12 sentences. Narrow lanes may be seal_offed by (riot police).Logical formLearned from12 sentences. Areas may be affected by riots.Logical formLearned from12 sentences. A policeman may be killed in riots.Logical formLearned from12 sentences. Orders can be constituted-of-or-filled-with (riot police).Logical formLearned from12 sentences. Some (riot police) can be with helmets.Logical formLearned from12 sentences.