Supports can be hollow.Logical formLearned from12 sentences. A rectangle can be hollow.Logical formLearned from12 sentences. Apartments can be hollow.Logical formLearned from12 sentences. (Steel tubes) can be hollow.Logical formLearned from12 sentences. Eyes can be hollow.Logical formLearned from12 sentences. A call may ring hollow.Logical formLearned from12 sentences. A cliche may ring hollow.Logical formLearned from12 sentences. Pledges can be hollow.Logical formLearned from12 sentences. A chuckle can be hollow.Logical formLearned from12 sentences. An eyed can be hollow.Logical formLearned from12 sentences. ..s can be hollow.Logical formLearned from12 sentences. An (energy debate) can be hollow.Logical formLearned from12 sentences. Bones can be hollow.Logical formLearned from12 sentences. A rhetoric may ring hollow.Logical formLearned from12 sentences. Sticks can be hollow.Logical formLearned from12 sentences.