Stone may throw riots.Logical formLearned from13 sentences. A demolition may follow a day of riots.Logical formLearned from13 sentences. Some (riot police) may take positions.Logical formLearned from13 sentences. (Riot police) may fire volleys of gas.Logical formLearned from13 sentences. Riots can be by mobs.Logical formLearned from13 sentences. A driving force can be behind riots.Logical formLearned from13 sentences. Some persons can be in riots.Logical formLearned from13 sentences. Communal riots can be deadly.Logical formLearned from13 sentences. Peaceful protests may erupt into riots.Logical formLearned from13 sentences. Presence can be constituted-of-or-filled-with (riot police).Logical formLearned from13 sentences. Protesters may scuffle with (riot police).Logical formLearned from13 sentences. (Food riots) can be around the world.Logical formLearned from13 sentences. Riots may undergo an eruption.Logical formLearned from13 sentences. Groups can be constituted-of-or-filled-with (riot police).Logical formLearned from13 sentences. (Race riots) may pertain-to a country.Logical formLearned from13 sentences.