(Riot squads) may fire gas.Logical formLearned from15 sentences. (Riot police) may be crushed.Logical formLearned from15 sentences. Riots can be between a month.Logical formLearned from15 sentences. Revenge can be for riots.Logical formLearned from15 sentences. Phalanxes can be constituted-of-or-filled-with (riot police).Logical formLearned from15 sentences. Riots may be sparked by an attack.Logical formLearned from15 sentences. A riot may be brought under control.Logical formLearned from14 sentences. A demonstration may turn into a riot.Logical formLearned from14 sentences. An impact may pertain-to riots.Logical formLearned from14 sentences. Riots can be organized.Logical formLearned from14 sentences. A riot can be spontaneous.Logical formLearned from14 sentences. A riot can be an incident.Logical formLearned from14 sentences. A riot can be fatal.Logical formLearned from14 sentences. An impact may pertain-to a riot.Logical formLearned from14 sentences. A (riot tour) may pertain-to a person.Logical formLearned from14 sentences.