Some positions can be empty.Logical formLearned from47 sentences. A speech can be empty.Logical formLearned from47 sentences. Envelopes can be empty.Logical formLearned from47 sentences. A well can be empty.Logical formLearned from47 sentences. An object can be empty.Logical formLearned from47 sentences. Arms can be empty.Logical formLearned from47 sentences. Cylinders can be empty.Logical formLearned from47 sentences. A bay can be empty.Logical formLearned from47 sentences. Shops can be empty.Logical formLearned from47 sentences. A driveway can be empty.Logical formLearned from47 sentences. A forest can be empty.Logical formLearned from47 sentences. A (coffee can) can be empty.Logical formLearned from47 sentences. (Store shelves) can be empty.Logical formLearned from47 sentences. A closet can be empty.Logical formLearned from46 sentences. A (picture frame) can be empty.Logical formLearned from46 sentences.