Instigators may pertain-to riots.Logical formLearned from10 sentences. Outbreaks can be constituted-of-or-filled-with riots.Logical formLearned from10 sentences. Dozens can be constituted-of-or-filled-with (riot troops).Logical formLearned from10 sentences. Scores of (riot police) may fend_off hundreds of persons.Logical formLearned from10 sentences. (Riot police) can be with clubs.Logical formLearned from10 sentences. (Riot officers) may fire gas.Logical formLearned from10 sentences. Riots may sweep a world-city.Logical formLearned from10 sentences. Riots may result in some deaths.Logical formLearned from10 sentences. Riots can be brutal.Logical formLearned from10 sentences. Prisoners may be killed in (jail riots).Logical formLearned from10 sentences. Riots can be nightly.Logical formLearned from10 sentences. Some (riot police) may enter a (prison compound).Logical formLearned from10 sentences. Riots can be after muslim prayers.Logical formLearned from10 sentences. Forces may interfere with riots.Logical formLearned from10 sentences. Riots may rock some parts of a nation.Logical formLearned from10 sentences.