Police may undergo a training.Logical formLearned from118 sentences. Powers may pertain-to the police.Logical formLearned from118 sentences. A person may be detained by police.Logical formLearned from118 sentences. A (police officer) can be on a scene.Logical formLearned from118 sentences. (Police forces) can be in a country.Logical formLearned from118 sentences. Police may come under fire.Logical formLearned from118 sentences. Head may pertain-to a police.Logical formLearned from118 sentences. Police may investigate a shooting.Logical formLearned from118 sentences. (Riot police) may use gas.Logical formLearned from118 sentences. Police may appeal for information.Logical formLearned from117 sentences. A (police officer) can be on condition of anonymity.Logical formLearned from117 sentences. A female may be arrested by police.Logical formLearned from117 sentences. A (police chief) may resign.Logical formLearned from117 sentences. (Police officers) may undergo a training.Logical formLearned from117 sentences. Protesters may clash with (riot police).Logical formLearned from117 sentences.