An opening of parliament may trigger riots.Logical formLearned from13 sentences. Scuffles can be between (riot police).Logical formLearned from13 sentences. Riots may pertain-to yesterday.Logical formLearned from13 sentences. Riots may kill thousands.Logical formLearned from13 sentences. A beginning may pertain-to riots.Logical formLearned from13 sentences. An investigation can be into riots.Logical formLearned from13 sentences. Fans may run riot.Logical formLearned from13 sentences. News may pertain-to riots.Logical formLearned from13 sentences. Some companies can be constituted-of-or-filled-with (riot police).Logical formLearned from13 sentences. A male may be killed in riots.Logical formLearned from12 sentences. (Riot police officers) can be armed.Logical formLearned from12 sentences. A riot may be put_downed.Logical formLearned from12 sentences. Some (riot police) can be on hand.Logical formLearned from12 sentences. (Race riots) can be in a country.Logical formLearned from12 sentences. Riots can be in some parts of a country.Logical formLearned from12 sentences.