An occiput can be hollow.Logical formLearned from2 sentences. A mast-crutch can be hollow.Logical formLearned from2 sentences. Trusses can be hollow.Logical formLearned from2 sentences. Utterances can be hollow.Logical formLearned from2 sentences. An interior may remain hollow.Logical formLearned from2 sentences. (Wall cavities) can be hollow.Logical formLearned from2 sentences. Students can be hollow.Logical formLearned from2 sentences. A covering can be hollow.Logical formLearned from2 sentences. Claims may prove hollow.Logical formLearned from2 sentences. A support can be hollow.Logical formLearned from2 sentences. A pedestal can be hollow.Logical formLearned from2 sentences. A life can be hollow.Logical formLearned from2 sentences. A formation can be hollow.Logical formLearned from2 sentences. A hollow way can be adjoining to a wood.Logical formLearned from2 sentences. A river can be hollow.Logical formLearned from2 sentences.