A dozen can be busy.Logical formLearned from5 sentences. (Police officers) can be busy.Logical formLearned from5 sentences. Airplane can be busy.Logical formLearned from5 sentences. Housewives can be busy.Logical formLearned from5 sentences. Some contractors can be busy.Logical formLearned from5 sentences. Passengers can be busy.Logical formLearned from5 sentences. A group of workers can be busy.Logical formLearned from5 sentences. An airline can be busy.Logical formLearned from5 sentences. Elders can be busy.Logical formLearned from5 sentences. Some (rescue workers) can be busy.Logical formLearned from5 sentences. A lobbying can be busy.Logical formLearned from5 sentences. A (gun store) can be busy.Logical formLearned from5 sentences. A colony can be busy.Logical formLearned from5 sentences. A militia can be busy.Logical formLearned from5 sentences. A (downtown core) can be busy.Logical formLearned from5 sentences.