Presence can be hollow.Logical formLearned from4 sentences. Features can be hollow.Logical formLearned from4 sentences. A motto can be hollow.Logical formLearned from4 sentences. A ram can be hollow.Logical formLearned from4 sentences. A reed can be hollow.Logical formLearned from4 sentences. A candidate can be hollow.Logical formLearned from4 sentences. A molecule can be hollow.Logical formLearned from4 sentences. Blocks can be hollow.Logical formLearned from4 sentences. Pledges may ring hollow.Logical formLearned from4 sentences. (Contribution limits) can be hollow.Logical formLearned from4 sentences. Half-hours can be hollow.Logical formLearned from4 sentences. A (wing bone) can be hollow.Logical formLearned from4 sentences. Watermelons may sound hollow.Logical formLearned from4 sentences. Cheeks can be hollow.Logical formLearned from4 sentences. Democratic ideals can be hollow.Logical formLearned from4 sentences.