Organs can be hollow.Logical formLearned from75 sentences. A victory can be hollow.Logical formLearned from75 sentences. Rings can be hollow.Logical formLearned from74 sentences. An area can be hollow.Logical formLearned from72 sentences. An attempt can be hollow.Logical formLearned from72 sentences. A force can be hollow.Logical formLearned from71 sentences. Words can be hollow.Logical formLearned from69 sentences. Structures can be hollow.Logical formLearned from68 sentences. A male may feel hollow.Logical formLearned from68 sentences. A thud can be hollow.Logical formLearned from67 sentences. A form can be hollow.Logical formLearned from65 sentences. An (orange plastic ball) can be hollow.Logical formLearned from62 sentences. A fiber can be hollow.Logical formLearned from61 sentences. A part can be hollow.Logical formLearned from60 sentences. A vessel can be hollow.Logical formLearned from57 sentences.