A pillar can be hollow.Logical formLearned from23 sentences. A leader can be hollow.Logical formLearned from23 sentences. Arguments may ring hollow.Logical formLearned from23 sentences. Rocks can be hollow.Logical formLearned from23 sentences. A column can be hollow.Logical formLearned from23 sentences. A sense can be hollow.Logical formLearned from23 sentences. A frame can be hollow.Logical formLearned from23 sentences. An excuse can be hollow.Logical formLearned from23 sentences. A threat can be hollow.Logical formLearned from23 sentences. Sockets can be hollow.Logical formLearned from23 sentences. Shafts can be hollow.Logical formLearned from23 sentences. Spines can be hollow.Logical formLearned from22 sentences. An oak can be hollow.Logical formLearned from22 sentences. A victory can be hollow.Logical formLearned from22 sentences. Gestures can be hollow.Logical formLearned from22 sentences.