Words can be hollow.Logical formLearned from200 sentences. A voice can be hollow.Logical formLearned from191 sentences. Logs can be hollow.Logical formLearned from191 sentences. A needle can be hollow.Logical formLearned from188 sentences. A core can be hollow.Logical formLearned from183 sentences. Cheeks can be hollow.Logical formLearned from169 sentences. A log can be hollow.Logical formLearned from166 sentences. Fibers can be hollow.Logical formLearned from154 sentences. A place can be hollow.Logical formLearned from153 sentences. Bones can be hollow.Logical formLearned from153 sentences. A ball can be hollow.Logical formLearned from148 sentences. A rhetoric can be hollow.Logical formLearned from146 sentences. Spaces can be hollow.Logical formLearned from141 sentences. A promise can be hollow.Logical formLearned from139 sentences. A square can be hollow.Logical formLearned from136 sentences.