A scientist can be busy.Logical formLearned from20 sentences. A two-lane highway can be busy.Logical formLearned from20 sentences. Runways can be busy.Logical formLearned from20 sentences. An (emergency department) can be busy.Logical formLearned from20 sentences. Workmen can be busy.Logical formLearned from20 sentences. A bakery can be busy.Logical formLearned from20 sentences. Adults can be busy.Logical formLearned from20 sentences. Leaders can be busy.Logical formLearned from20 sentences. A (city intersection) can be busy.Logical formLearned from20 sentences. Lizzies can be busy.Logical formLearned from20 sentences. A (trade route) can be busy.Logical formLearned from20 sentences. A (working city) can be busy.Logical formLearned from20 sentences. An (airport road) can be busy.Logical formLearned from20 sentences. A court can be busy.Logical formLearned from20 sentences. An age can be busy.Logical formLearned from19 sentences.