Balls can be hollow.Logical formLearned from3 sentences. A ranch can be hollow.Logical formLearned from3 sentences. Spars can be hollow.Logical formLearned from3 sentences. A spheroid can be hollow.Logical formLearned from3 sentences. (Road wheels) can be hollow.Logical formLearned from3 sentences. Runs can be hollow.Logical formLearned from3 sentences. A southwest can be hollow.Logical formLearned from3 sentences. (Charge warheads) can be hollow.Logical formLearned from3 sentences. Cannonballs can be hollow.Logical formLearned from3 sentences. A hollow man may be voted.Logical formLearned from3 sentences. Oranges can be hollow.Logical formLearned from3 sentences. A (magnifier probe) can be hollow.Logical formLearned from3 sentences. Ashes can be hollow.Logical formLearned from3 sentences. A knight can be hollow.Logical formLearned from3 sentences. A history can be hollow.Logical formLearned from3 sentences.