(Steel rods) can be hollow.Logical formLearned from2 sentences. A (talking point) can be hollow.Logical formLearned from2 sentences. A trick can be hollow.Logical formLearned from2 sentences. A ledge can be hollow.Logical formLearned from2 sentences. A (metal core) can be hollow.Logical formLearned from2 sentences. A plant can be hollow.Logical formLearned from2 sentences. A flooring can be hollow.Logical formLearned from2 sentences. A treatment can be hollow.Logical formLearned from2 sentences. A male may ring hollow.Logical formLearned from2 sentences. Eyesockets can be hollow.Logical formLearned from2 sentences. Allegations can be hollow.Logical formLearned from2 sentences. Ideals can be hollow.Logical formLearned from2 sentences. A promise can be hollow.Logical formLearned from2 sentences. A stupa can be hollow.Logical formLearned from2 sentences. A theater can be hollow.Logical formLearned from2 sentences.