A statement can be hollow.Logical formLearned from14 sentences. A stomach can be hollow.Logical formLearned from14 sentences. A boast can be hollow.Logical formLearned from14 sentences. Bars can be hollow.Logical formLearned from14 sentences. A mold can be hollow.Logical formLearned from14 sentences. (Plant stems) can be hollow.Logical formLearned from13 sentences. Veins can be hollow.Logical formLearned from13 sentences. Attacks can be hollow.Logical formLearned from13 sentences. Pillars can be hollow.Logical formLearned from13 sentences. A bit can be hollow.Logical formLearned from13 sentences. Horns can be hollow.Logical formLearned from13 sentences. A case can be hollow.Logical formLearned from13 sentences. A sensation can be hollow.Logical formLearned from13 sentences. A series can be hollow.Logical formLearned from13 sentences. A (shell mispronunciation) can be hollow.Logical formLearned from13 sentences.