An effigy can be hollow.Logical formLearned from25 sentences. A sound can be hollow.Logical formLearned from25 sentences. Leaves can be hollow.Logical formLearned from24 sentences. (Fiber membranes) can be hollow.Logical formLearned from24 sentences. A stalk can be hollow.Logical formLearned from24 sentences. Power can be hollow.Logical formLearned from24 sentences. Dreams can be hollow.Logical formLearned from24 sentences. A (rubber ball) can be hollow.Logical formLearned from24 sentences. A nature can be hollow.Logical formLearned from24 sentences. Condemnations of a country may ring hollow.Logical formLearned from24 sentences. A policy can be hollow.Logical formLearned from24 sentences. A stem can be hollow.Logical formLearned from23 sentences. A globe can be hollow.Logical formLearned from23 sentences. Phrases can be hollow.Logical formLearned from23 sentences. A claim can be hollow.Logical formLearned from23 sentences.