A (traffic jam) can be dangerous.Logical formLearned from6 sentences. Water may back_up behind an (ice jam).Logical formLearned from6 sentences. A person may escape jams.Logical formLearned from6 sentences. A (jam jar) can be empty.Logical formLearned from6 sentences. (Traffic jams) can be unprecedented.Logical formLearned from6 sentences. A (traffic jam) can be for some hours.Logical formLearned from6 sentences. (Road authorities) may report (traffic jams).Logical formLearned from6 sentences. Authorities may report (traffic jams).Logical formLearned from6 sentences. A (traffic jam) may be caused by some armored cars.Logical formLearned from6 sentences. A (traffic jam) may give rioters a chance.Logical formLearned from6 sentences. (Traffic jams) can be around a city.Logical formLearned from6 sentences. A (traffic jam) can be in a city.Logical formLearned from6 sentences. Some kilometres can be constituted-of-or-filled-with jams.Logical formLearned from6 sentences. Persons may be stuck in (traffic jams).Logical formLearned from6 sentences. (Traffic jams) may begin.Logical formLearned from6 sentences.