Legs can be hollow.Logical formLearned from35 sentences. A phrase can be hollow.Logical formLearned from34 sentences. A door can be hollow.Logical formLearned from34 sentences. A wall can be hollow.Logical formLearned from34 sentences. A shape can be hollow.Logical formLearned from33 sentences. A (post mill) can be hollow.Logical formLearned from33 sentences. A vein can be hollow.Logical formLearned from32 sentences. A tooth can be hollow.Logical formLearned from32 sentences. A leg can be hollow.Logical formLearned from32 sentences. Sections can be hollow.Logical formLearned from32 sentences. Bones can be hollow.Logical formLearned from31 sentences. A stump can be hollow.Logical formLearned from31 sentences. A theory can be hollow.Logical formLearned from31 sentences. Ones can be hollow.Logical formLearned from31 sentences. A pen can be hollow.Logical formLearned from31 sentences.