A quality can be hollow.Logical formLearned from31 sentences. An existence can be hollow.Logical formLearned from31 sentences. A section can be hollow.Logical formLearned from31 sentences. A thump can be hollow.Logical formLearned from31 sentences. Slogans can be hollow.Logical formLearned from31 sentences. An instrument can be hollow.Logical formLearned from30 sentences. A slogan can be hollow.Logical formLearned from30 sentences. A .. can be hollow.Logical formLearned from30 sentences. A circle can be hollow.Logical formLearned from30 sentences. A pit can be hollow.Logical formLearned from30 sentences. A bone can be hollow.Logical formLearned from30 sentences. Claims may ring hollow.Logical formLearned from30 sentences. A female may feel hollow.Logical formLearned from30 sentences. (Tree trunks) can be hollow.Logical formLearned from29 sentences. An object can be hollow.Logical formLearned from29 sentences.