A riot may undergo an investigation.Logical formLearned from22 sentences. Riots can be in suburbs.Logical formLearned from22 sentences. Riots can be small-scale.Logical formLearned from22 sentences. Students may battle (riot police).Logical formLearned from22 sentences. Riots can be motivated.Logical formLearned from22 sentences. Scuffles may break_out between (riot police).Logical formLearned from22 sentences. Some persons may be arrested during riots.Logical formLearned from22 sentences. A reference can be to some riots.Logical formLearned from22 sentences. Hundreds of (riot police) may be ringed.Logical formLearned from22 sentences. Some persons may be injured in a riot.Logical formLearned from22 sentences. A riot can be in a month.Logical formLearned from22 sentences. Riots may erupt in a month.Logical formLearned from22 sentences. Riots can be in a town.Logical formLearned from22 sentences. Some riot can be in a world-city.Logical formLearned from22 sentences. A black woman can be during some (race riots).Logical formLearned from22 sentences.