A handle can be empty.Logical formLearned from15 sentences. Planes can be empty.Logical formLearned from15 sentences. A package can be empty.Logical formLearned from15 sentences. A terrain can be empty.Logical formLearned from15 sentences. Lots can be empty.Logical formLearned from15 sentences. A casket can be empty.Logical formLearned from15 sentences. (Ballast tanks) can be empty.Logical formLearned from15 sentences. A challenge can be empty.Logical formLearned from15 sentences. An other side can be empty.Logical formLearned from15 sentences. Traps can be empty.Logical formLearned from15 sentences. Beds can be empty.Logical formLearned from15 sentences. A pouch can be empty.Logical formLearned from15 sentences. Barns can be empty.Logical formLearned from15 sentences. Trains can be empty.Logical formLearned from15 sentences. A userid can be empty.Logical formLearned from15 sentences.