A motive may remain mysterious.Logical formLearned from10 sentences. Passions can be mysterious.Logical formLearned from10 sentences. Missions can be mysterious.Logical formLearned from10 sentences. A (bird flu virus) can be mysterious.Logical formLearned from10 sentences. (Attache cases) can be mysterious.Logical formLearned from10 sentences. An enclave can be mysterious.Logical formLearned from10 sentences. Ambushes can be mysterious.Logical formLearned from10 sentences. A knock can be mysterious.Logical formLearned from10 sentences. A romance can be mysterious.Logical formLearned from10 sentences. A (poisoning death) can be mysterious.Logical formLearned from10 sentences. An informer can be mysterious.Logical formLearned from10 sentences. Shootings can be mysterious.Logical formLearned from10 sentences. A flash can be mysterious.Logical formLearned from10 sentences. A (motorcycle crash) can be mysterious.Logical formLearned from10 sentences. A reason can be mysterious.Logical formLearned from10 sentences.