(Drill bits) can be hollow.Logical formLearned from2 sentences. A stance can be hollow.Logical formLearned from2 sentences. A hollow tree may be cut_downed.Logical formLearned from2 sentences. Hands can be hollow.Logical formLearned from2 sentences. (Turbine blades) can be hollow.Logical formLearned from2 sentences. A seam can be hollow.Logical formLearned from2 sentences. A (ball joint) can be hollow.Logical formLearned from2 sentences. A (bone structure) can be hollow.Logical formLearned from2 sentences. A (wire road) can be hollow.Logical formLearned from2 sentences. A (plant stem) can be hollow.Logical formLearned from2 sentences. A plate can be hollow.Logical formLearned from2 sentences. A fire can be hollow.Logical formLearned from2 sentences. Examples can be hollow.Logical formLearned from2 sentences. A (note head) can be hollow.Logical formLearned from2 sentences. Cords can be hollow.Logical formLearned from2 sentences.