Riots can be an attempt.Logical formLearned from13 sentences. (Riot police) may drop shields.Logical formLearned from13 sentences. Firebombs can be at (riot police).Logical formLearned from13 sentences. Riots may lead to a downfall.Logical formLearned from13 sentences. Riots can be in 1980s.Logical formLearned from13 sentences. A male may refer to riots.Logical formLearned from13 sentences. Protests may degenerate into riots.Logical formLearned from13 sentences. A stadium can be in riots.Logical formLearned from13 sentences. (Riot police) may clash with thousands of persons.Logical formLearned from13 sentences. Riots may break_out over prices.Logical formLearned from13 sentences. An aftermath may pertain-to a riot.Logical formLearned from13 sentences. Details may pertain-to a riot.Logical formLearned from13 sentences. Riots can be over (food costs).Logical formLearned from13 sentences. Hundreds can be constituted-of-or-filled-with riot.Logical formLearned from13 sentences. A riot can be in a jail.Logical formLearned from13 sentences.