Bread may sound hollow.Logical formLearned from9 sentences. A stick can be hollow.Logical formLearned from9 sentences. Piers can be hollow.Logical formLearned from9 sentences. A reservoir can be hollow.Logical formLearned from9 sentences. Roads can be hollow.Logical formLearned from9 sentences. Farms can be hollow.Logical formLearned from9 sentences. A fibre can be hollow.Logical formLearned from9 sentences. A (nerve cord) can be hollow.Logical formLearned from9 sentences. Drums can be hollow.Logical formLearned from9 sentences. (Glass microspheres) can be hollow.Logical formLearned from9 sentences. A clang can be hollow.Logical formLearned from9 sentences. A neck can be hollow.Logical formLearned from9 sentences. A male may kiss a hollow point.Logical formLearned from9 sentences. A hollow point can be between collarbones.Logical formLearned from9 sentences. Hearts can be hollow.Logical formLearned from9 sentences.