Police can be on alert.Logical formLearned from816 sentences. Thousands can be constituted-of-or-filled-with (police officers).Logical formLearned from806 sentences. A police may pertain-to a male.Logical formLearned from800 sentences. A person may tell police.Logical formLearned from797 sentences. Attacks can be on police.Logical formLearned from788 sentences. Police may use gas.Logical formLearned from766 sentences. Police can be in (riot gear).Logical formLearned from764 sentences. A police may pertain-to persons.Logical formLearned from755 sentences. A group can be constituted-of-or-filled-with (police officers).Logical formLearned from750 sentences. A (police headquarters) may pertain-to a world-city.Logical formLearned from743 sentences. The police may arrive.Logical formLearned from741 sentences. A (police officer) may pertain-to a world-city.Logical formLearned from729 sentences. A (police agency) can be international.Logical formLearned from715 sentences. Police may make some arrests.Logical formLearned from715 sentences. Witnesses may tell police.Logical formLearned from710 sentences.