A request can be hollow.Logical formLearned from2 sentences. Fibers can be hollow.Logical formLearned from2 sentences. A meaninglessness can be hollow.Logical formLearned from2 sentences. A person may take a hollow man.Logical formLearned from2 sentences. A program can be hollow.Logical formLearned from2 sentences. Craniums can be hollow.Logical formLearned from2 sentences. Explanations can be hollow.Logical formLearned from2 sentences. Characterizations can be hollow.Logical formLearned from2 sentences. A competition can be hollow.Logical formLearned from2 sentences. A dialogue can be hollow.Logical formLearned from2 sentences. A (tennis ball) can be hollow.Logical formLearned from2 sentences. Petioles can be hollow.Logical formLearned from2 sentences. (Glass capillary tubes) can be hollow.Logical formLearned from2 sentences. A well can be hollow.Logical formLearned from2 sentences. A blastosphere can be hollow.Logical formLearned from2 sentences.