A tooth can be hollow.Logical formLearned from2 sentences. A javelin can be hollow.Logical formLearned from2 sentences. Forgings can be hollow.Logical formLearned from2 sentences. (Metal beads) can be hollow.Logical formLearned from2 sentences. An (iron sphere) can be hollow.Logical formLearned from2 sentences. Nerves can be hollow.Logical formLearned from2 sentences. A pommel can be hollow.Logical formLearned from2 sentences. An entrance can be to the hollow earth.Logical formLearned from2 sentences. (Valve stems) can be hollow.Logical formLearned from2 sentences. A (spherical shell) can be hollow.Logical formLearned from2 sentences. A shaped charge can be hollow.Logical formLearned from2 sentences. A (brass anvil) can be hollow.Logical formLearned from2 sentences. Gates can be hollow.Logical formLearned from2 sentences. A casque can be hollow.Logical formLearned from2 sentences. Stipules can be hollow.Logical formLearned from2 sentences.